diff --git a/FirebaseAI.podspec b/FirebaseAI.podspec
index e6fc558b0bc..a4e2e1e49be 100644
--- a/FirebaseAI.podspec
+++ b/FirebaseAI.podspec
@@ -19,9 +19,9 @@ Build AI-powered apps and features with the Gemini API using the Firebase AI SDK
   s.social_media_url = 'https://twitter.com/Firebase'
 
   ios_deployment_target = '15.0'
-  osx_deployment_target = '12.0'
+  osx_deployment_target = '10.15'
   tvos_deployment_target = '15.0'
-  watchos_deployment_target = '8.0'
+  watchos_deployment_target = '7.0'
 
   s.ios.deployment_target = ios_deployment_target
   s.osx.deployment_target = osx_deployment_target
diff --git a/FirebaseAI/Sources/AILog.swift b/FirebaseAI/Sources/AILog.swift
index 345451bf07f..a6c1b9eed7e 100644
--- a/FirebaseAI/Sources/AILog.swift
+++ b/FirebaseAI/Sources/AILog.swift
@@ -139,7 +139,6 @@ enum AILog {
     log(level: .debug, code: code, message)
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   static func makeInternalError(message: String, code: MessageCode) -> GenerateContentError {
     let error = GenerateContentError.internalError(underlying: NSError(
       domain: "\(Constants.baseErrorDomain).Internal",
diff --git a/FirebaseAI/Sources/Chat.swift b/FirebaseAI/Sources/Chat.swift
index 59911e9de95..6df47d96670 100644
--- a/FirebaseAI/Sources/Chat.swift
+++ b/FirebaseAI/Sources/Chat.swift
@@ -16,7 +16,6 @@ import Foundation
 
 /// An object that represents a back-and-forth chat with a model, capturing the history and saving
 /// the context in memory between each message sent.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class Chat: Sendable {
   private let model: GenerativeModel
   private let _history: History
@@ -62,7 +61,7 @@ public final class Chat: Sendable {
   /// and response will be added to the history. If unsuccessful, history will remain unchanged.
   /// - Parameter parts: The new content to send as a single chat message.
   /// - Returns: A stream containing the model's response or an error if an error occurred.
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   public func sendMessageStream(_ parts: any PartsRepresentable...) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
     return try sendMessageStream([ModelContent(parts: parts)])
@@ -72,7 +71,7 @@ public final class Chat: Sendable {
   /// and response will be added to the history. If unsuccessful, history will remain unchanged.
   /// - Parameter content: The new content to send as a single chat message.
   /// - Returns: A stream containing the model's response or an error if an error occurred.
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   public func sendMessageStream(_ content: [ModelContent]) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
     return try sendMessageStream(content, generationConfig: generationConfig)
@@ -106,6 +105,7 @@ public final class Chat: Sendable {
     return result
   }
 
+  @available(macOS 12.0, watchOS 8.0, *)
   func sendMessageStream(_ content: [ModelContent], generationConfig: GenerationConfig?) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
     // Ensure that the new content has the role set.
diff --git a/FirebaseAI/Sources/Extensions/Internal/GenerationSchema+Gemini.swift b/FirebaseAI/Sources/Extensions/Internal/GenerationSchema+Gemini.swift
index 88d7054cd4e..8d94798f895 100644
--- a/FirebaseAI/Sources/Extensions/Internal/GenerationSchema+Gemini.swift
+++ b/FirebaseAI/Sources/Extensions/Internal/GenerationSchema+Gemini.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FirebaseAI.GenerationSchema {
   /// Returns a Gemini-compatible JSON Schema of this `GenerationSchema`.
   func toGeminiJSONSchema() throws -> JSONObject {
diff --git a/FirebaseAI/Sources/FirebaseAI.swift b/FirebaseAI/Sources/FirebaseAI.swift
index 87bd3ccf804..4cfef987554 100644
--- a/FirebaseAI/Sources/FirebaseAI.swift
+++ b/FirebaseAI/Sources/FirebaseAI.swift
@@ -21,7 +21,6 @@ import Foundation
 internal import FirebaseCoreExtension
 
 /// The Firebase AI SDK provides access to Gemini models directly from your app.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class FirebaseAI: Sendable {
   // MARK: - Public APIs
 
@@ -197,7 +196,6 @@ public final class FirebaseAI: Sendable {
   ///   - systemInstruction: Instructions that direct the model to behave a certain way; currently
   ///     only text content is supported.
   ///   - requestOptions: Configuration parameters for sending requests to the backend.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
   @available(watchOS, unavailable)
   public func liveModel(modelName: String,
                         generationConfig: LiveGenerationConfig? = nil,
diff --git a/FirebaseAI/Sources/FirebaseInfo.swift b/FirebaseAI/Sources/FirebaseInfo.swift
index 6b10dec4e5f..160dfc787ae 100644
--- a/FirebaseAI/Sources/FirebaseInfo.swift
+++ b/FirebaseAI/Sources/FirebaseInfo.swift
@@ -20,7 +20,6 @@ import Foundation
 @preconcurrency import FirebaseCore
 
 /// Firebase data used by FirebaseAI
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct FirebaseInfo: Sendable {
   let appCheck: AppCheckInterop?
   let auth: AuthInterop?
diff --git a/FirebaseAI/Sources/GenerateContentError.swift b/FirebaseAI/Sources/GenerateContentError.swift
index 76ce516f3cf..4607edd327d 100644
--- a/FirebaseAI/Sources/GenerateContentError.swift
+++ b/FirebaseAI/Sources/GenerateContentError.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Errors that occur when generating content from a model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public enum GenerateContentError: Error {
   /// An internal error occurred. See the underlying error for more context.
   case internalError(underlying: Error)
diff --git a/FirebaseAI/Sources/GenerateContentRequest.swift b/FirebaseAI/Sources/GenerateContentRequest.swift
index bc4e9797760..9ff9edb68bc 100644
--- a/FirebaseAI/Sources/GenerateContentRequest.swift
+++ b/FirebaseAI/Sources/GenerateContentRequest.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct GenerateContentRequest: Sendable {
   /// Model name.
   let model: String
@@ -31,7 +30,6 @@ struct GenerateContentRequest: Sendable {
   let options: RequestOptions
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentRequest: Encodable {
   enum CodingKeys: String, CodingKey {
     case model
@@ -60,7 +58,6 @@ extension GenerateContentRequest: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentRequest {
   enum APIMethod: String {
     case generateContent
@@ -69,7 +66,6 @@ extension GenerateContentRequest {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentRequest: GenerativeAIRequest {
   typealias Response = GenerateContentResponse
 
diff --git a/FirebaseAI/Sources/GenerateContentResponse.swift b/FirebaseAI/Sources/GenerateContentResponse.swift
index 648ed0d15c0..a9f517b5cc1 100644
--- a/FirebaseAI/Sources/GenerateContentResponse.swift
+++ b/FirebaseAI/Sources/GenerateContentResponse.swift
@@ -15,10 +15,8 @@
 import Foundation
 
 /// The model's response to a generate content request.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct GenerateContentResponse: Sendable {
   /// Token usage metadata for processing the generate content request.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct UsageMetadata: Sendable {
     /// The number of tokens in the request prompt.
     public let promptTokenCount: Int
@@ -155,7 +153,6 @@ public struct GenerateContentResponse: Sendable {
 
 /// A struct representing a possible reply to a content generation prompt. Each content generation
 /// prompt may produce multiple candidate responses.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct Candidate: Sendable {
   /// The response's content.
   public let content: ModelContent
@@ -196,14 +193,12 @@ public struct Candidate: Sendable {
 }
 
 /// A collection of source attributions for a piece of content.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct CitationMetadata: Sendable {
   /// A list of individual cited sources and the parts of the content to which they apply.
   public let citations: [Citation]
 }
 
 /// A struct describing a source attribution.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct Citation: Sendable, Equatable {
   /// The inclusive beginning of a sequence in a model response that derives from a cited source.
   public let startIndex: Int
@@ -241,7 +236,6 @@ public struct Citation: Sendable, Equatable {
 }
 
 /// A value enumerating possible reasons for a model to terminate a content generation request.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FinishReason: DecodableProtoEnum, Hashable, Sendable {
   enum Kind: String {
     case stop = "STOP"
@@ -296,10 +290,8 @@ public struct FinishReason: DecodableProtoEnum, Hashable, Sendable {
 }
 
 /// A metadata struct containing any feedback the model had on the prompt it was provided.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct PromptFeedback: Sendable {
   /// A type describing possible reasons to block a prompt.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct BlockReason: DecodableProtoEnum, Hashable, Sendable {
     enum Kind: String {
       case safety = "SAFETY"
@@ -355,7 +347,6 @@ public struct PromptFeedback: Sendable {
 /// [Gemini Developer API](https://ai.google.dev/gemini-api/terms#grounding-with-google-search)
 /// or Vertex AI Gemini API (see [Service Terms](https://cloud.google.com/terms/service-terms)
 /// section within the Service Specific Terms).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct GroundingMetadata: Sendable, Equatable, Hashable {
   /// A list of web search queries that the model performed to gather the grounding information.
   /// These can be used to allow users to explore the search results themselves.
@@ -372,7 +363,6 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
   public let searchEntryPoint: SearchEntryPoint?
 
   /// A struct representing the Google Search entry point.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct SearchEntryPoint: Sendable, Equatable, Hashable {
     /// An HTML/CSS snippet that can be embedded in your app.
     ///
@@ -382,14 +372,12 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
 
   /// Represents a chunk of retrieved data that supports a claim in the model's response. This is
   /// part of the grounding information provided when grounding is enabled.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct GroundingChunk: Sendable, Equatable, Hashable {
     /// Contains details if the grounding chunk is from a web source.
     public let web: WebGroundingChunk?
   }
 
   /// A grounding chunk sourced from the web.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct WebGroundingChunk: Sendable, Equatable, Hashable {
     /// The URI of the retrieved web page.
     public let uri: String?
@@ -403,7 +391,6 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
 
   /// Provides information about how a specific segment of the model's response is supported by the
   /// retrieved grounding chunks.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct GroundingSupport: Sendable, Equatable, Hashable {
     /// Specifies the segment of the model's response content that this grounding support pertains
     /// to.
@@ -436,7 +423,6 @@ public struct GroundingMetadata: Sendable, Equatable, Hashable {
 
 /// Represents a specific segment within a ``ModelContent`` struct, often used to pinpoint the
 /// exact location of text or data that grounding information refers to.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct Segment: Sendable, Equatable, Hashable {
   /// The zero-based index of the ``Part`` object within the `parts` array of its parent
   /// ``ModelContent`` object. This identifies which part of the content the segment belongs to.
@@ -454,7 +440,6 @@ public struct Segment: Sendable, Equatable, Hashable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentResponse: Decodable {
   enum CodingKeys: String, CodingKey {
     case candidates
@@ -490,7 +475,6 @@ extension GenerateContentResponse: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerateContentResponse.UsageMetadata: Decodable {
   enum CodingKeys: CodingKey {
     case promptTokenCount
@@ -532,7 +516,6 @@ extension GenerateContentResponse.UsageMetadata: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Candidate: Decodable {
   enum CodingKeys: CodingKey {
     case content
@@ -593,7 +576,6 @@ extension Candidate: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension CitationMetadata: Decodable {
   enum CodingKeys: CodingKey {
     case citations // Vertex AI
@@ -612,7 +594,6 @@ extension CitationMetadata: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Citation: Decodable {
   enum CodingKeys: CodingKey {
     case startIndex
@@ -664,7 +645,6 @@ extension Citation: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension PromptFeedback: Decodable {
   enum CodingKeys: CodingKey {
     case blockReason
@@ -690,7 +670,6 @@ extension PromptFeedback: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata: Decodable {
   enum CodingKeys: String, CodingKey {
     case webSearchQueries
@@ -717,16 +696,12 @@ extension GroundingMetadata: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.SearchEntryPoint: Decodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.GroundingChunk: Decodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.WebGroundingChunk: Decodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GroundingMetadata.GroundingSupport.Internal: Decodable {
   enum CodingKeys: String, CodingKey {
     case segment
@@ -743,7 +718,6 @@ extension GroundingMetadata.GroundingSupport.Internal: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Segment: Decodable {
   enum CodingKeys: String, CodingKey {
     case partIndex
diff --git a/FirebaseAI/Sources/GenerationConfig.swift b/FirebaseAI/Sources/GenerationConfig.swift
index f420e7fee44..830f5b68df0 100644
--- a/FirebaseAI/Sources/GenerationConfig.swift
+++ b/FirebaseAI/Sources/GenerationConfig.swift
@@ -16,7 +16,6 @@ import Foundation
 
 /// A struct defining model parameters to be used when sending generative AI
 /// requests to the backend model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct GenerationConfig: Sendable {
   /// Controls the degree of randomness in token selection.
   var temperature: Float?
@@ -255,7 +254,6 @@ public struct GenerationConfig: Sendable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GenerationConfig: Encodable {
   enum CodingKeys: String, CodingKey {
     case temperature
diff --git a/FirebaseAI/Sources/GenerativeAIRequest.swift b/FirebaseAI/Sources/GenerativeAIRequest.swift
index 192de607137..a82d8284919 100644
--- a/FirebaseAI/Sources/GenerativeAIRequest.swift
+++ b/FirebaseAI/Sources/GenerativeAIRequest.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 protocol GenerativeAIRequest: Sendable, Encodable {
   associatedtype Response: Sendable, Decodable
 
@@ -24,7 +23,6 @@ protocol GenerativeAIRequest: Sendable, Encodable {
 }
 
 /// Configuration parameters for sending requests to the backend.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct RequestOptions: Sendable {
   /// The request’s timeout interval in seconds; if not specified uses the default value for a
   /// `URLRequest`.
@@ -39,5 +37,4 @@ public struct RequestOptions: Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension RequestOptions: Equatable {}
diff --git a/FirebaseAI/Sources/GenerativeAIService.swift b/FirebaseAI/Sources/GenerativeAIService.swift
index da2c4b6a283..a482e1db45f 100644
--- a/FirebaseAI/Sources/GenerativeAIService.swift
+++ b/FirebaseAI/Sources/GenerativeAIService.swift
@@ -18,7 +18,6 @@ import FirebaseCore
 import Foundation
 import os.log
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct GenerativeAIService {
   /// The language of the SDK in the format `gl-<language>/<version>`.
   static let languageTag = "gl-swift/5"
@@ -39,7 +38,9 @@ struct GenerativeAIService {
     let urlRequest = try await urlRequest(request: request)
 
     #if DEBUG
-      printCURLCommand(from: urlRequest)
+      if #available(macOS 11.0, *) {
+        printCURLCommand(from: urlRequest)
+      }
     #endif
 
     let data: Data
@@ -67,7 +68,7 @@ struct GenerativeAIService {
     return try parseResponse(T.Response.self, from: data)
   }
 
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   func loadRequestStream<T: GenerativeAIRequest>(request: T)
     -> AsyncThrowingStream<T.Response, Error> where T: Sendable {
     return AsyncThrowingStream { continuation in
@@ -301,6 +302,7 @@ struct GenerativeAIService {
   }
 
   #if DEBUG
+    @available(macOS 11.0, *)
     private func cURLCommand(from request: URLRequest) -> String {
       var returnValue = "curl "
       if let allHeaders = request.allHTTPHeaderFields {
@@ -320,6 +322,7 @@ struct GenerativeAIService {
       return returnValue
     }
 
+    @available(macOS 11.0, *)
     private func printCURLCommand(from request: URLRequest) {
       guard AILog.additionalLoggingEnabled() else {
         return
diff --git a/FirebaseAI/Sources/GenerativeModel.swift b/FirebaseAI/Sources/GenerativeModel.swift
index d180c98248d..765b0252ac2 100644
--- a/FirebaseAI/Sources/GenerativeModel.swift
+++ b/FirebaseAI/Sources/GenerativeModel.swift
@@ -18,7 +18,6 @@ import Foundation
 
 /// A type that represents a remote multimodal model (like Gemini), with the ability to generate
 /// content based on various input types.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class GenerativeModel: Sendable {
   /// Model name prefix to identify Gemini models.
   static let geminiModelNamePrefix = "gemini-"
@@ -161,7 +160,7 @@ public final class GenerativeModel: Sendable {
   ///   conforming types).
   /// - Returns: A stream wrapping content generated by the model or a ``GenerateContentError``
   ///     error if an error occurred.
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   public func generateContentStream(_ parts: any PartsRepresentable...) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
     return try generateContentStream([ModelContent(parts: parts)])
@@ -172,7 +171,7 @@ public final class GenerativeModel: Sendable {
   /// - Parameter content: The input(s) given to the model as a prompt.
   /// - Returns: A stream wrapping content generated by the model or a ``GenerateContentError``
   ///     error if an error occurred.
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   public func generateContentStream(_ content: [ModelContent]) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
     try content.throwIfError()
@@ -365,7 +364,7 @@ public final class GenerativeModel: Sendable {
     return response
   }
 
-  @available(macOS 12.0, *)
+  @available(macOS 12.0, watchOS 8.0, *)
   func generateContentStream(_ content: [ModelContent],
                              generationConfig: GenerationConfig?) throws
     -> AsyncThrowingStream<GenerateContentResponse, Error> {
diff --git a/FirebaseAI/Sources/GenerativeModelSession.swift b/FirebaseAI/Sources/GenerativeModelSession.swift
index 5a940c7b582..d161112f5fa 100644
--- a/FirebaseAI/Sources/GenerativeModelSession.swift
+++ b/FirebaseAI/Sources/GenerativeModelSession.swift
@@ -50,7 +50,6 @@
   /// print("Bio: \(response.content.bio)")
   /// print("Favorite Topics: \(response.content.favoriteTopics.joined(separator: ", "))")
   /// ```
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public final class GenerativeModelSession: Sendable {
     let session: Chat
 
@@ -217,6 +216,7 @@
     /// - Parameter options: An optional `GenerationConfig` to override the model's default
     /// generation configuration.
     /// - Returns: A `ResponseStream` that yields snapshots of the generated content.
+    @available(macOS 12.0, watchOS 8.0, *)
     public func streamResponse(to prompt: PartsRepresentable..., options: GenerationConfig? = nil)
       -> sending GenerativeModelSession.ResponseStream<String, String> {
       return streamResponse(
@@ -271,6 +271,7 @@
       )
     }
 
+    @available(macOS 12.0, watchOS 8.0, *)
     private func streamResponse<Content, PartialContent>(to prompt: [PartsRepresentable],
                                                          schema: FirebaseAI.GenerationSchema?,
                                                          generating type: Content.Type,
@@ -438,7 +439,6 @@
 
   // MARK: - Response Types
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public extension GenerativeModelSession {
     /// The response from a `respond` call.
     struct Response<Content> {
@@ -451,7 +451,6 @@
     }
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public extension GenerativeModelSession {
     /// An asynchronous sequence of snapshots of the model's response.
     struct ResponseStream<Content, PartialContent>: AsyncSequence {
@@ -541,7 +540,6 @@
     }
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension GenerativeModelSession.ResponseStream {
     struct RawResult: Sendable {
       let rawContent: FirebaseAI.GeneratedContent
@@ -639,7 +637,6 @@
     }
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension GenerativeModelSession {
     enum ErrorCodes: Int {
       // Generation Errors
diff --git a/FirebaseAI/Sources/History.swift b/FirebaseAI/Sources/History.swift
index 827f7df5b46..394262fe511 100644
--- a/FirebaseAI/Sources/History.swift
+++ b/FirebaseAI/Sources/History.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class History: Sendable {
   private let historyLock = NSLock()
   private nonisolated(unsafe) var _history: [ModelContent] = []
diff --git a/FirebaseAI/Sources/JSONValue.swift b/FirebaseAI/Sources/JSONValue.swift
index f1333888d27..c12e8aecb0f 100644
--- a/FirebaseAI/Sources/JSONValue.swift
+++ b/FirebaseAI/Sources/JSONValue.swift
@@ -18,14 +18,12 @@ import Foundation
 ///
 /// This may be decoded from, or encoded to, a
 /// [`google.protobuf.Struct`](https://protobuf.dev/reference/protobuf/google.protobuf/#struct).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public typealias JSONObject = [String: JSONValue]
 
 /// Represents a value in one of JSON's data types.
 ///
 /// This may be decoded from, or encoded to, a
 /// [`google.protobuf.Value`](https://protobuf.dev/reference/protobuf/google.protobuf/#value).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public enum JSONValue: Sendable {
   /// A `null` value.
   case null
@@ -46,7 +44,6 @@ public enum JSONValue: Sendable {
   case array([JSONValue])
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension JSONValue: Decodable {
   public init(from decoder: Decoder) throws {
     let container = try decoder.singleValueContainer()
@@ -71,7 +68,6 @@ extension JSONValue: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension JSONValue: Encodable {
   public func encode(to encoder: Encoder) throws {
     var container = encoder.singleValueContainer()
@@ -97,5 +93,4 @@ extension JSONValue: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension JSONValue: Equatable {}
diff --git a/FirebaseAI/Sources/ModalityTokenCount.swift b/FirebaseAI/Sources/ModalityTokenCount.swift
index e7e36ece21e..fa7f88c37ad 100644
--- a/FirebaseAI/Sources/ModalityTokenCount.swift
+++ b/FirebaseAI/Sources/ModalityTokenCount.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Represents token counting info for a single modality.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ModalityTokenCount: Sendable {
   /// The modality associated with this token count.
   public let modality: ContentModality
@@ -25,7 +24,6 @@ public struct ModalityTokenCount: Sendable {
 }
 
 /// Content part modality.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ContentModality: DecodableProtoEnum, Hashable, Sendable {
   enum Kind: String {
     case text = "TEXT"
@@ -59,7 +57,6 @@ public struct ContentModality: DecodableProtoEnum, Hashable, Sendable {
 
 // MARK: Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ModalityTokenCount: Decodable {
   enum CodingKeys: CodingKey {
     case modality
diff --git a/FirebaseAI/Sources/ModelContent.swift b/FirebaseAI/Sources/ModelContent.swift
index cfe5b8ac3e5..da1b56e3700 100644
--- a/FirebaseAI/Sources/ModelContent.swift
+++ b/FirebaseAI/Sources/ModelContent.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension [ModelContent] {
   // TODO: Rename and refactor this.
   func throwIfError() throws {
@@ -31,7 +30,6 @@ extension [ModelContent] {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct InternalPart: Equatable, Sendable {
   enum OneOfData: Equatable, Sendable {
     case text(String)
@@ -67,7 +65,6 @@ struct InternalPart: Equatable, Sendable {
 /// A type describing data in media formats interpretable by an AI model. Each generative AI
 /// request or response contains an `Array` of ``ModelContent``s, and each ``ModelContent`` value
 /// may comprise multiple heterogeneous ``Part``s.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ModelContent: Equatable, Sendable {
   /// The role of the entity creating the ``ModelContent``. For user-generated client requests,
   /// for example, the role is `user`.
@@ -173,7 +170,6 @@ public struct ModelContent: Equatable, Sendable {
 
 // MARK: Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ModelContent: Codable {
   enum CodingKeys: String, CodingKey {
     case role
@@ -187,7 +183,6 @@ extension ModelContent: Codable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension InternalPart: Codable {
   enum CodingKeys: String, CodingKey {
     case isThought = "thought"
@@ -216,7 +211,6 @@ extension InternalPart: Codable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension InternalPart.OneOfData: Codable {
   enum CodingKeys: String, CodingKey {
     case text
diff --git a/FirebaseAI/Sources/PartsRepresentable+Image.swift b/FirebaseAI/Sources/PartsRepresentable+Image.swift
index 5bedeb8f3d1..8ac5546aef1 100644
--- a/FirebaseAI/Sources/PartsRepresentable+Image.swift
+++ b/FirebaseAI/Sources/PartsRepresentable+Image.swift
@@ -37,7 +37,6 @@ enum ImageConversionError: Error {
 
 #if canImport(UIKit)
   /// Enables images to be representable as ``PartsRepresentable``.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension UIImage: PartsRepresentable {
     public var partsValue: [any Part] {
       guard let data = jpegData(compressionQuality: imageCompressionQuality) else {
@@ -49,7 +48,6 @@ enum ImageConversionError: Error {
 
 #elseif canImport(AppKit)
   /// Enables images to be representable as ``PartsRepresentable``.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension NSImage: PartsRepresentable {
     public var partsValue: [any Part] {
       guard let cgImage = cgImage(forProposedRect: nil, context: nil, hints: nil) else {
@@ -67,12 +65,16 @@ enum ImageConversionError: Error {
 
 #if !os(watchOS) // This code does not build on watchOS.
   /// Enables `CGImages` to be representable as model content.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
   extension CGImage: PartsRepresentable {
     public var partsValue: [any Part] {
       let output = NSMutableData()
+      let jpegIdentifier = if #available(macOS 11.0, *) {
+        UTType.jpeg.identifier
+      } else {
+        "public.jpeg"
+      }
       guard let imageDestination = CGImageDestinationCreateWithData(
-        output, UTType.jpeg.identifier as CFString, 1, nil
+        output, jpegIdentifier as CFString, 1, nil
       ) else {
         return [ErrorPart(ImageConversionError.couldNotAllocateDestination)]
       }
@@ -90,7 +92,6 @@ enum ImageConversionError: Error {
 
 #if canImport(CoreImage)
   /// Enables `CIImages` to be representable as model content.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
   extension CIImage: PartsRepresentable {
     public var partsValue: [any Part] {
       let context = CIContext()
diff --git a/FirebaseAI/Sources/PartsRepresentable.swift b/FirebaseAI/Sources/PartsRepresentable.swift
index 82d0688df38..24cef0b5d6a 100644
--- a/FirebaseAI/Sources/PartsRepresentable.swift
+++ b/FirebaseAI/Sources/PartsRepresentable.swift
@@ -16,13 +16,11 @@ import Foundation
 
 /// A protocol describing any data that could be serialized to model-interpretable input data,
 /// where the serialization process cannot fail with an error.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public protocol PartsRepresentable {
   var partsValue: [any Part] { get }
 }
 
 /// Enables a ``Part`` to be used as a ``PartsRepresentable``.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public extension Part {
   var partsValue: [any Part] {
     return [self]
@@ -31,7 +29,6 @@ public extension Part {
 
 /// Enable an `Array` of ``PartsRepresentable`` values to be passed in as a single
 /// ``PartsRepresentable``.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension [PartsRepresentable]: PartsRepresentable {
   public var partsValue: [any Part] {
     return flatMap { $0.partsValue }
@@ -39,7 +36,6 @@ extension [PartsRepresentable]: PartsRepresentable {
 }
 
 /// Enables a `String` to be passed in as ``PartsRepresentable``.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension String: PartsRepresentable {
   public var partsValue: [any Part] {
     return [TextPart(self)]
diff --git a/FirebaseAI/Sources/Protocols/Public/ConvertibleFromGeneratedContent.swift b/FirebaseAI/Sources/Protocols/Public/ConvertibleFromGeneratedContent.swift
index ad922156f17..75b638d634c 100644
--- a/FirebaseAI/Sources/Protocols/Public/ConvertibleFromGeneratedContent.swift
+++ b/FirebaseAI/Sources/Protocols/Public/ConvertibleFromGeneratedContent.swift
@@ -13,14 +13,12 @@
 // limitations under the License.
 
 #if compiler(>=6.2)
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension FirebaseAI {
     protocol ConvertibleFromGeneratedContent {
       init(_ content: FirebaseAI.GeneratedContent) throws
     }
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   extension String: FirebaseAI.ConvertibleFromGeneratedContent {
     init(_ content: FirebaseAI.GeneratedContent) throws {
       guard case let .string(value) = content.kind else {
diff --git a/FirebaseAI/Sources/Safety.swift b/FirebaseAI/Sources/Safety.swift
index a116089a7cd..32b5c3a1eb0 100644
--- a/FirebaseAI/Sources/Safety.swift
+++ b/FirebaseAI/Sources/Safety.swift
@@ -17,7 +17,6 @@ import Foundation
 /// A type defining potentially harmful media categories and their model-assigned ratings. A value
 /// of this type may be assigned to a category for every model-generated response, not just
 /// responses that exceed a certain threshold.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct SafetyRating: Equatable, Hashable, Sendable {
   /// The category describing the potential harm a piece of content may pose.
   ///
@@ -75,7 +74,6 @@ public struct SafetyRating: Equatable, Hashable, Sendable {
   /// The probability that a given model output falls under a harmful content category.
   ///
   /// > Note: This does not indicate the severity of harm for a piece of content.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct HarmProbability: DecodableProtoEnum, Hashable, Sendable {
     enum Kind: String {
       case unspecified = "HARM_PROBABILITY_UNSPECIFIED"
@@ -115,7 +113,6 @@ public struct SafetyRating: Equatable, Hashable, Sendable {
   }
 
   /// The magnitude of how harmful a model response might be for the respective ``HarmCategory``.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct HarmSeverity: DecodableProtoEnum, Hashable, Sendable {
     enum Kind: String {
       case unspecified = "HARM_SEVERITY_UNSPECIFIED"
@@ -157,7 +154,6 @@ public struct SafetyRating: Equatable, Hashable, Sendable {
 /// See [safety settings for Gemini
 /// models](https://firebase.google.com/docs/vertex-ai/safety-settings?platform=ios#gemini) for
 /// more details.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct SafetySetting: Sendable {
   /// Block at and beyond a specified ``SafetyRating/HarmProbability``.
   public struct HarmBlockThreshold: EncodableProtoEnum, Sendable {
@@ -188,7 +184,6 @@ public struct SafetySetting: Sendable {
   }
 
   /// The method of computing whether the ``SafetySetting/HarmBlockThreshold`` has been exceeded.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct HarmBlockMethod: EncodableProtoEnum, Sendable {
     enum Kind: String {
       case severity = "SEVERITY"
@@ -239,7 +234,6 @@ public struct SafetySetting: Sendable {
 }
 
 /// Categories describing the potential harm a piece of content may pose.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct HarmCategory: CodableProtoEnum, Hashable, Sendable {
   enum Kind: String {
     case unspecified = "HARM_CATEGORY_UNSPECIFIED"
@@ -280,7 +274,6 @@ public struct HarmCategory: CodableProtoEnum, Hashable, Sendable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension SafetyRating: Decodable {
   enum CodingKeys: CodingKey {
     case category
@@ -308,8 +301,6 @@ extension SafetyRating: Decodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension SafetySetting.HarmBlockThreshold: Encodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension SafetySetting: Encodable {}
diff --git a/FirebaseAI/Sources/TemplateChatSession.swift b/FirebaseAI/Sources/TemplateChatSession.swift
index abba669a1dd..27ceed8a0b4 100644
--- a/FirebaseAI/Sources/TemplateChatSession.swift
+++ b/FirebaseAI/Sources/TemplateChatSession.swift
@@ -19,7 +19,6 @@ import Foundation
 /// A chat session that allows for conversation with a model.
 ///
 /// **Public Preview**: This API is a public preview and may be subject to change.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class TemplateChatSession: Sendable {
   private let model: TemplateGenerativeModel
   private let templateID: String
@@ -102,6 +101,7 @@ final class TemplateChatSession: Sendable {
   /// request timeout.
   /// - Returns: An `AsyncThrowingStream` that yields `GenerateContentResponse` objects.
   /// - Throws: A ``GenerateContentError`` if the request failed.
+  @available(macOS 12.0, watchOS 8.0, *)
   func sendMessageStream(_ content: [ModelContent],
                          inputs: [String: Any],
                          options: RequestOptions = RequestOptions()) throws
@@ -157,6 +157,7 @@ final class TemplateChatSession: Sendable {
   /// request timeout.
   /// - Returns: An `AsyncThrowingStream` that yields `GenerateContentResponse` objects.
   /// - Throws: A ``GenerateContentError`` if the request failed.
+  @available(macOS 12.0, watchOS 8.0, *)
   func sendMessageStream(_ message: any PartsRepresentable,
                          inputs: [String: Any],
                          options: RequestOptions = RequestOptions()) throws
diff --git a/FirebaseAI/Sources/TemplateGenerateContentRequest.swift b/FirebaseAI/Sources/TemplateGenerateContentRequest.swift
index 20ba84b3571..92e451ef30d 100644
--- a/FirebaseAI/Sources/TemplateGenerateContentRequest.swift
+++ b/FirebaseAI/Sources/TemplateGenerateContentRequest.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct TemplateGenerateContentRequest: Sendable {
   let template: String
   let inputs: [String: TemplateInput]
@@ -25,7 +24,6 @@ struct TemplateGenerateContentRequest: Sendable {
   let options: RequestOptions
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension TemplateGenerateContentRequest: Encodable {
   enum CodingKeys: String, CodingKey {
     case inputs
@@ -39,7 +37,6 @@ extension TemplateGenerateContentRequest: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension TemplateGenerateContentRequest: GenerativeAIRequest {
   typealias Response = GenerateContentResponse
 
diff --git a/FirebaseAI/Sources/TemplateGenerativeModel.swift b/FirebaseAI/Sources/TemplateGenerativeModel.swift
index bf727021c0f..3716b52c538 100644
--- a/FirebaseAI/Sources/TemplateGenerativeModel.swift
+++ b/FirebaseAI/Sources/TemplateGenerativeModel.swift
@@ -18,7 +18,6 @@ import Foundation
 /// content based on various input types.
 ///
 /// **Public Preview**: This API is a public preview and may be subject to change.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class TemplateGenerativeModel: Sendable {
   let generativeAIService: GenerativeAIService
   let apiConfig: APIConfig
@@ -89,6 +88,7 @@ public final class TemplateGenerativeModel: Sendable {
   /// request timeout.
   /// - Returns: An `AsyncThrowingStream` that yields `GenerateContentResponse` objects.
   /// - Throws: A ``GenerateContentError`` if the request failed.
+  @available(macOS 12.0, watchOS 8.0, *)
   public func generateContentStream(templateID: String,
                                     inputs: [String: Any],
                                     options: RequestOptions = RequestOptions()) throws
@@ -106,6 +106,7 @@ public final class TemplateGenerativeModel: Sendable {
     return generativeAIService.loadRequestStream(request: request)
   }
 
+  @available(macOS 12.0, watchOS 8.0, *)
   func generateContentStreamWithHistory(history: [ModelContent], template: String,
                                         inputs: [String: TemplateInput],
                                         options: RequestOptions = RequestOptions()) throws
diff --git a/FirebaseAI/Sources/TemplateImagenGenerationRequest.swift b/FirebaseAI/Sources/TemplateImagenGenerationRequest.swift
index c155b66fe55..aa88392fd37 100644
--- a/FirebaseAI/Sources/TemplateImagenGenerationRequest.swift
+++ b/FirebaseAI/Sources/TemplateImagenGenerationRequest.swift
@@ -18,7 +18,6 @@ enum ImageAPIMethod: String {
   case generateImages = "templatePredict"
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct TemplateImagenGenerationRequest<ImageType: ImagenImageRepresentable>: Sendable {
   typealias Response = ImagenGenerationResponse<ImageType>
 
@@ -38,7 +37,6 @@ struct TemplateImagenGenerationRequest<ImageType: ImagenImageRepresentable>: Sen
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension TemplateImagenGenerationRequest: GenerativeAIRequest where ImageType: Decodable {
   func getURL() throws -> URL {
     var urlString =
@@ -54,7 +52,6 @@ extension TemplateImagenGenerationRequest: GenerativeAIRequest where ImageType:
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension TemplateImagenGenerationRequest: Encodable {
   enum CodingKeys: String, CodingKey {
     case inputs
diff --git a/FirebaseAI/Sources/TemplateImagenModel.swift b/FirebaseAI/Sources/TemplateImagenModel.swift
index b8cfcb9a9cb..83c62a40dcf 100644
--- a/FirebaseAI/Sources/TemplateImagenModel.swift
+++ b/FirebaseAI/Sources/TemplateImagenModel.swift
@@ -19,7 +19,6 @@ import Foundation
 /// images based on various input types.
 ///
 /// **Public Preview**: This API is a public preview and may be subject to change.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class TemplateImagenModel: Sendable {
   let generativeAIService: GenerativeAIService
   let apiConfig: APIConfig
diff --git a/FirebaseAI/Sources/Tool.swift b/FirebaseAI/Sources/Tool.swift
index 53e0ee8b49e..dda4dd1e1ea 100644
--- a/FirebaseAI/Sources/Tool.swift
+++ b/FirebaseAI/Sources/Tool.swift
@@ -18,7 +18,6 @@ import Foundation
 ///
 /// This `FunctionDeclaration` is a representation of a block of code that can be used as a ``Tool``
 /// by the model and executed by the client.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FunctionDeclaration: Sendable {
   /// The name of the function.
   let name: String
@@ -58,7 +57,6 @@ public struct FunctionDeclaration: Sendable {
 /// [Gemini Developer API](https://ai.google.dev/gemini-api/terms#grounding-with-google-search)
 /// or Vertex AI Gemini API (see [Service Terms](https://cloud.google.com/terms/service-terms)
 /// section within the Service Specific Terms).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct GoogleSearch: Sendable {
   public init() {}
 }
@@ -67,7 +65,6 @@ public struct GoogleSearch: Sendable {
 ///
 /// A `Tool` is a piece of code that enables the system to interact with external systems to perform
 /// an action, or set of actions, outside of knowledge and scope of the model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct Tool: Sendable {
   /// A list of `FunctionDeclarations` available to the model.
   let functionDeclarations: [FunctionDeclaration]?
@@ -149,7 +146,6 @@ public struct Tool: Sendable {
 }
 
 /// Configuration for specifying function calling behavior.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FunctionCallingConfig: Sendable {
   /// Defines the execution behavior for function calling by defining the execution mode.
   enum Mode: String {
@@ -195,7 +191,6 @@ public struct FunctionCallingConfig: Sendable {
 }
 
 /// Tool configuration for any `Tool` specified in the request.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ToolConfig: Sendable {
   let functionCallingConfig: FunctionCallingConfig?
 
@@ -206,7 +201,6 @@ public struct ToolConfig: Sendable {
 
 // MARK: - Codable Conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FunctionDeclaration: Encodable {
   enum CodingKeys: String, CodingKey {
     case name
@@ -222,17 +216,12 @@ extension FunctionDeclaration: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Tool: Encodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FunctionCallingConfig: Encodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FunctionCallingConfig.Mode: Encodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension GoogleSearch: Encodable {}
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ToolConfig: Encodable {}
diff --git a/FirebaseAI/Sources/Types/Internal/Errors/EmptyContentError.swift b/FirebaseAI/Sources/Types/Internal/Errors/EmptyContentError.swift
index 7c33a975c18..85e2660a59c 100644
--- a/FirebaseAI/Sources/Types/Internal/Errors/EmptyContentError.swift
+++ b/FirebaseAI/Sources/Types/Internal/Errors/EmptyContentError.swift
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Candidate {
   struct EmptyContentError: Error {
     let localizedDescription = "Invalid Candidate: empty content and no finish reason"
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationInstance.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationInstance.swift
index c1d853643cc..b43eef12f03 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationInstance.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationInstance.swift
@@ -12,15 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImageGenerationInstance {
   let prompt: String
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationInstance: Equatable {}
 
 // MARK: - Codable Conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationInstance: Encodable {}
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationOutputOptions.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationOutputOptions.swift
index 0b678187ee2..8098bae36f0 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationOutputOptions.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationOutputOptions.swift
@@ -14,16 +14,13 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImageGenerationOutputOptions {
   let mimeType: String
   let compressionQuality: Int?
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationOutputOptions: Equatable {}
 
 // MARK: - Codable Conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationOutputOptions: Encodable {}
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationParameters.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationParameters.swift
index aa1e1b085c8..5e4ee267e63 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationParameters.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImageGenerationParameters.swift
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImageGenerationParameters {
   let sampleCount: Int?
   let storageURI: String?
@@ -26,12 +25,10 @@ struct ImageGenerationParameters {
   let includeSafetyAttributes: Bool?
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationParameters: Equatable {}
 
 // MARK: - Codable Conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImageGenerationParameters: Encodable {
   enum CodingKeys: String, CodingKey {
     case sampleCount
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGCSImage.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGCSImage.swift
index 030fe76c681..c94227caa3f 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGCSImage.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGCSImage.swift
@@ -17,7 +17,6 @@ import Foundation
 /// An image generated by Imagen, stored in Cloud Storage (GCS) for Firebase.
 ///
 /// TODO(#14451): Make this `public` and move to the `Public` directory when ready.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImagenGCSImage: Sendable {
   /// The IANA standard MIME type of the image file; either `"image/png"` or `"image/jpeg"`.
   ///
@@ -36,7 +35,6 @@ struct ImagenGCSImage: Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGCSImage: ImagenImageRepresentable {
   // TODO(andrewheard): Make this public when the SDK supports Imagen operations that take images as
   // input (upscaling / editing).
@@ -45,12 +43,10 @@ extension ImagenGCSImage: ImagenImageRepresentable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGCSImage: Equatable {}
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGCSImage: Decodable {
   enum CodingKeys: String, CodingKey {
     case mimeType
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGenerationRequest.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGenerationRequest.swift
index 9f5a76137d3..06954a06fec 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGenerationRequest.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenGenerationRequest.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImagenGenerationRequest<ImageType: ImagenImageRepresentable>: Sendable {
   let model: String
   let apiConfig: APIConfig
@@ -35,7 +34,6 @@ struct ImagenGenerationRequest<ImageType: ImagenImageRepresentable>: Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGenerationRequest: GenerativeAIRequest where ImageType: Decodable {
   typealias Response = ImagenGenerationResponse<ImageType>
 
@@ -49,7 +47,6 @@ extension ImagenGenerationRequest: GenerativeAIRequest where ImageType: Decodabl
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGenerationRequest: Encodable {
   enum CodingKeys: CodingKey {
     case instances
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenImageRepresentable.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenImageRepresentable.swift
index 1c53eb0f9b6..cd86a19b7aa 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenImageRepresentable.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenImageRepresentable.swift
@@ -16,7 +16,6 @@ import Foundation
 
 // TODO(andrewheard): Make this public when the SDK supports Imagen operations that take images as
 // input (upscaling / editing).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 protocol ImagenImageRepresentable: Sendable {
   /// Internal representation of the image for use with the Imagen model.
   ///
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenSafetyAttributes.swift b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenSafetyAttributes.swift
index 3dcb93d544a..69e081514c9 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/ImagenSafetyAttributes.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/ImagenSafetyAttributes.swift
@@ -18,7 +18,6 @@ import Foundation
 ///
 /// This prediction is currently unused by the SDK and is only checked to be valid JSON. This type
 /// is currently only used to avoid logging unsupported prediction types.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ImagenSafetyAttributes: Decodable {
   let safetyAttributes: JSONObject
 }
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/InternalImagenImage.swift b/FirebaseAI/Sources/Types/Internal/Imagen/InternalImagenImage.swift
index 76b668b6981..12373ec47f7 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/InternalImagenImage.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/InternalImagenImage.swift
@@ -21,7 +21,6 @@ import Foundation
 ///
 /// TODO(andrewheard): Make this public when the SDK supports Imagen operations that take images as
 /// input (upscaling / editing).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct _InternalImagenImage {
   let mimeType: String
   let bytesBase64Encoded: String?
diff --git a/FirebaseAI/Sources/Types/Internal/Imagen/RAIFilteredReason.swift b/FirebaseAI/Sources/Types/Internal/Imagen/RAIFilteredReason.swift
index d1bb64da9cc..1aa68c79cb6 100644
--- a/FirebaseAI/Sources/Types/Internal/Imagen/RAIFilteredReason.swift
+++ b/FirebaseAI/Sources/Types/Internal/Imagen/RAIFilteredReason.swift
@@ -12,12 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct RAIFilteredReason {
   let raiFilteredReason: String
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension RAIFilteredReason: Decodable {
   enum CodingKeys: CodingKey {
     case raiFilteredReason
diff --git a/FirebaseAI/Sources/Types/Internal/InternalPart.swift b/FirebaseAI/Sources/Types/Internal/InternalPart.swift
index a9d5a2eb810..dd9bb9bf55b 100644
--- a/FirebaseAI/Sources/Types/Internal/InternalPart.swift
+++ b/FirebaseAI/Sources/Types/Internal/InternalPart.swift
@@ -14,7 +14,6 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct InlineData: Codable, Equatable, Sendable {
   let mimeType: String
   let data: Data
@@ -25,7 +24,6 @@ struct InlineData: Codable, Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct FileData: Codable, Equatable, Sendable {
   let fileURI: String
   let mimeType: String
@@ -41,7 +39,6 @@ struct FileData: Codable, Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct FunctionCall: Equatable, Sendable {
   let name: String
   let args: JSONObject
@@ -54,7 +51,6 @@ struct FunctionCall: Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct FunctionResponse: Codable, Equatable, Sendable {
   let name: String
   let response: JSONObject
@@ -67,7 +63,6 @@ struct FunctionResponse: Codable, Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ExecutableCode: Codable, Equatable, Sendable {
   struct Language: CodableProtoEnum, Sendable, Equatable {
     enum Kind: String {
@@ -90,7 +85,6 @@ struct ExecutableCode: Codable, Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct CodeExecutionResult: Codable, Equatable, Sendable {
   struct Outcome: CodableProtoEnum, Sendable, Equatable {
     enum Kind: String {
@@ -115,7 +109,6 @@ struct CodeExecutionResult: Codable, Equatable, Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct ErrorPart: Part, Error {
   let error: Error
 
@@ -129,7 +122,6 @@ struct ErrorPart: Part, Error {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FunctionCall: Codable {
   init(from decoder: Decoder) throws {
     let container = try decoder.container(keyedBy: CodingKeys.self)
@@ -143,7 +135,6 @@ extension FunctionCall: Codable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ErrorPart: Codable {
   init(from decoder: any Decoder) throws {
     fatalError("Decoding an ErrorPart is not supported.")
@@ -156,7 +147,6 @@ extension ErrorPart: Codable {
 
 // MARK: - Equatable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ErrorPart: Equatable {
   static func == (lhs: ErrorPart, rhs: ErrorPart) -> Bool {
     fatalError("Comparing ErrorParts for equality is not supported.")
diff --git a/FirebaseAI/Sources/Types/Internal/Live/AsyncWebSocket.swift b/FirebaseAI/Sources/Types/Internal/Live/AsyncWebSocket.swift
index 81c1c337258..38503be2ef5 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/AsyncWebSocket.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/AsyncWebSocket.swift
@@ -21,7 +21,6 @@ private import FirebaseCoreInternal
 /// friendly interface for sending and consuming data from it.
 ///
 /// Also surfaces a more fine-grained ``WebSocketClosedError`` for when the web socket is closed.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 final class AsyncWebSocket: Sendable {
   private let webSocketTask: URLSessionWebSocketTask
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientContent.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientContent.swift
index 459aa258cc3..7f97fdc4cad 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientContent.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientContent.swift
@@ -19,7 +19,6 @@ import Foundation
 /// history and used as part of the prompt to the model to generate content.
 ///
 /// A message here will interrupt any current model generation.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentClientContent: Encodable {
   /// The content appended to the current conversation with the model.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientMessage.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientMessage.swift
index 758d75e2cc7..0b25c7b4e25 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientMessage.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentClientMessage.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Messages sent by the client in the BidiGenerateContent RPC call.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 enum BidiGenerateContentClientMessage {
   /// Message to be sent in the first and only first client message.
@@ -31,7 +30,6 @@ enum BidiGenerateContentClientMessage {
   case toolResponse(BidiGenerateContentToolResponse)
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 extension BidiGenerateContentClientMessage: Encodable {
   enum CodingKeys: CodingKey {
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentRealtimeInput.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentRealtimeInput.swift
index 753a9a3fb15..a2bdb7cb481 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentRealtimeInput.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentRealtimeInput.swift
@@ -28,7 +28,6 @@ import Foundation
 ///   to optimize for a fast start of the response from the model.
 /// - Is always assumed to be the user's input (cannot be used to populate
 ///   conversation history).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentRealtimeInput: Encodable {
   /// These form the realtime audio input stream.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerContent.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerContent.swift
index 648d7a09ed8..d765be9169b 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerContent.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerContent.swift
@@ -19,7 +19,6 @@ import Foundation
 ///
 /// Content is generated as quickly as possible, and not in realtime. Clients
 /// may choose to buffer and play it out in realtime.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentServerContent: Decodable, Sendable {
   /// The content that the model has generated as part of the current
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerMessage.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerMessage.swift
index 8c7c628ebdb..23389b53142 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerMessage.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentServerMessage.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Response message for BidiGenerateContent RPC call.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentServerMessage: Sendable {
   /// The type of the message.
@@ -48,7 +47,6 @@ struct BidiGenerateContentServerMessage: Sendable {
 
 // MARK: - Decodable
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 extension BidiGenerateContentServerMessage: Decodable {
   enum CodingKeys: String, CodingKey {
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetup.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetup.swift
index 15dc8889a0b..96a4082a599 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetup.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetup.swift
@@ -20,7 +20,6 @@ import Foundation
 ///
 /// Clients should wait for a `BidiGenerateContentSetupComplete` message before
 /// sending any additional messages.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentSetup: Encodable {
   /// The fully qualified name of the publisher model.
@@ -73,6 +72,5 @@ struct BidiGenerateContentSetup: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiAudioTranscriptionConfig: Encodable {}
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetupComplete.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetupComplete.swift
index 54449782060..5207ec81b72 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetupComplete.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentSetupComplete.swift
@@ -15,6 +15,5 @@
 import Foundation
 
 /// Sent in response to a `BidiGenerateContentSetup` message from the client.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentSetupComplete: Decodable, Sendable {}
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCall.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCall.swift
index 4c34e6367e9..cd124ca2948 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCall.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCall.swift
@@ -16,7 +16,6 @@ import Foundation
 
 /// Request for the client to execute the `function_calls` and return the
 /// responses with the matching `id`s.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentToolCall: Decodable, Sendable {
   /// The function call to be executed.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCallCancellation.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCallCancellation.swift
index 48bc991c1fa..0c334df05d3 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCallCancellation.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolCallCancellation.swift
@@ -19,7 +19,6 @@ import Foundation
 /// cancelled. If there were side-effects to those tool calls, clients may
 /// attempt to undo the tool calls. This message occurs only in cases where the
 /// clients interrupt server turns.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentToolCallCancellation: Decodable, Sendable {
   /// The ids of the tool calls to be cancelled.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolResponse.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolResponse.swift
index c9d2506895b..7950fc8c68a 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolResponse.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentToolResponse.swift
@@ -22,7 +22,6 @@ import Foundation
 /// calling happens by exchanging the `Content` parts, while in the bidi
 /// GenerateContent APIs function calling happens over these dedicated set of
 /// messages.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentToolResponse: Encodable {
   /// The response to the function calls.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentTranscription.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentTranscription.swift
index 652799edf9d..390d308d7f6 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentTranscription.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerateContentTranscription.swift
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerateContentTranscription: Decodable, Sendable {
   let text: String?
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerationConfig.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerationConfig.swift
index a3a3e8a9f99..4834101ffb3 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiGenerationConfig.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiGenerationConfig.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Configuration options for live content generation.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiGenerationConfig: Encodable, Sendable {
   let temperature: Float?
diff --git a/FirebaseAI/Sources/Types/Internal/Live/BidiSpeechConfig.swift b/FirebaseAI/Sources/Types/Internal/Live/BidiSpeechConfig.swift
index 80e7d341ef7..f3ab6bbe449 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/BidiSpeechConfig.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/BidiSpeechConfig.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Speech generation config.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct BidiSpeechConfig: Encodable, Sendable {
   /// The configuration for the speaker to use.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/GoAway.swift b/FirebaseAI/Sources/Types/Internal/Live/GoAway.swift
index f5c858b8b45..e8076c3945e 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/GoAway.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/GoAway.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Server will not be able to service client soon.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct GoAway: Decodable, Sendable {
   /// The remaining time before the connection will be terminated as ABORTED.
diff --git a/FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift b/FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift
index a2fd31b34e9..60c143cbc2b 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift
@@ -28,7 +28,6 @@ import Foundation
 ///
 /// This mainly comes into play when we don't want to block developers from sending messages while a
 /// session is being reloaded.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 actor LiveSessionService {
   let responses: AsyncThrowingStream<LiveServerMessage, Error>
diff --git a/FirebaseAI/Sources/Types/Internal/Live/VoiceConfig.swift b/FirebaseAI/Sources/Types/Internal/Live/VoiceConfig.swift
index 0e6790c03f2..07c38ed6f5c 100644
--- a/FirebaseAI/Sources/Types/Internal/Live/VoiceConfig.swift
+++ b/FirebaseAI/Sources/Types/Internal/Live/VoiceConfig.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Configuration for the speaker to use.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 enum VoiceConfig {
   /// Configuration for the prebuilt voice to use.
@@ -29,7 +28,6 @@ enum VoiceConfig {
 ///
 /// Not just a string on the parent proto, because there'll likely be a lot
 /// more options here.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct PrebuiltVoiceConfig: Encodable, Sendable {
   /// The name of the preset voice to use.
@@ -41,7 +39,6 @@ struct PrebuiltVoiceConfig: Encodable, Sendable {
 }
 
 /// The configuration for the custom voice to use.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 struct CustomVoiceConfig: Encodable, Sendable {
   /// The sample of the custom voice, in pcm16 s16e format.
@@ -54,7 +51,6 @@ struct CustomVoiceConfig: Encodable, Sendable {
 
 // MARK: - Encodable conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 extension VoiceConfig: Encodable {
   enum CodingKeys: CodingKey {
diff --git a/FirebaseAI/Sources/Types/Internal/Requests/CountTokensRequest.swift b/FirebaseAI/Sources/Types/Internal/Requests/CountTokensRequest.swift
index be3e09c3060..3fb46272727 100644
--- a/FirebaseAI/Sources/Types/Internal/Requests/CountTokensRequest.swift
+++ b/FirebaseAI/Sources/Types/Internal/Requests/CountTokensRequest.swift
@@ -14,14 +14,12 @@
 
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct CountTokensRequest {
   let modelResourceName: String
 
   let generateContentRequest: GenerateContentRequest
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension CountTokensRequest: GenerativeAIRequest {
   typealias Response = CountTokensResponse
 
@@ -41,7 +39,6 @@ extension CountTokensRequest: GenerativeAIRequest {
 }
 
 /// The model's response to a count tokens request.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct CountTokensResponse: Sendable {
   /// The total number of tokens in the input given to the model as a prompt.
   public let totalTokens: Int
@@ -52,7 +49,6 @@ public struct CountTokensResponse: Sendable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension CountTokensRequest: Encodable {
   enum VertexCodingKeys: CodingKey {
     case contents
@@ -92,7 +88,6 @@ extension CountTokensRequest: Encodable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension CountTokensResponse: Decodable {
   enum CodingKeys: CodingKey {
     case totalTokens
diff --git a/FirebaseAI/Sources/Types/Internal/Tools/URLContext.swift b/FirebaseAI/Sources/Types/Internal/Tools/URLContext.swift
index 2033bb940f1..faebc4a263f 100644
--- a/FirebaseAI/Sources/Types/Internal/Tools/URLContext.swift
+++ b/FirebaseAI/Sources/Types/Internal/Tools/URLContext.swift
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 struct URLContext: Sendable, Encodable {
   init() {}
 }
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenAspectRatio.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenAspectRatio.swift
index a7e9fd905f0..c6357db43e0 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenAspectRatio.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenAspectRatio.swift
@@ -20,7 +20,6 @@ import Foundation
 /// your ``ImagenGenerationConfig``. See the [Cloud
 /// documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images#aspect-ratio)
 /// for more details and examples of the supported aspect ratios.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenAspectRatio: Sendable {
   /// Square (1:1) aspect ratio.
   ///
@@ -58,7 +57,6 @@ public struct ImagenAspectRatio: Sendable {
   let rawValue: String
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenAspectRatio: ProtoEnum {
   enum Kind: String {
     case square1x1 = "1:1"
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationConfig.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationConfig.swift
index 66623aeedf1..4f91364a597 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationConfig.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationConfig.swift
@@ -17,7 +17,6 @@
 /// See [Parameters for Imagen
 /// models](https://firebase.google.com/docs/vertex-ai/model-parameters?platform=ios#imagen) to
 /// learn about parameters available for use with Imagen models, including how to configure them.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenGenerationConfig {
   /// Specifies elements to exclude from the generated image.
   ///
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationResponse.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationResponse.swift
index 9ed52c4d0e9..fe3e5b4f41d 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationResponse.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenGenerationResponse.swift
@@ -20,7 +20,6 @@ import Foundation
 ///
 /// This type is returned from:
 ///   - ``ImagenModel/generateImages(prompt:)`` where `T` is ``ImagenInlineImage``
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 // TODO(#14451): Re-add "- ``ImagenModel/generateImages(prompt:gcsURI:)`` where `T` is
 //                         ``ImagenGCSImage``" in the DocC above.
 public struct ImagenGenerationResponse<T>: Sendable where T: Sendable {
@@ -43,7 +42,6 @@ public struct ImagenGenerationResponse<T>: Sendable where T: Sendable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenGenerationResponse: Decodable where T: Decodable {
   enum CodingKeys: CodingKey {
     case predictions
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenImageFormat.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenImageFormat.swift
index 9ae6af3c6ac..449f321b7fa 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenImageFormat.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenImageFormat.swift
@@ -20,7 +20,6 @@ import Foundation
 /// your ``ImagenGenerationConfig``. See the [Cloud
 /// documentation](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/imagen-api#output-options)
 /// for more details.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenImageFormat {
   let mimeType: String
   let compressionQuality: Int?
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenInlineImage.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenInlineImage.swift
index 4f9a1d9d74f..75ed2419fa0 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenInlineImage.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenInlineImage.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// An image generated by Imagen, represented as inline data.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenInlineImage: Sendable {
   /// The IANA standard MIME type of the image file; either `"image/png"` or `"image/jpeg"`.
   ///
@@ -32,7 +31,6 @@ public struct ImagenInlineImage: Sendable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenInlineImage: ImagenImageRepresentable {
   // TODO(andrewheard): Make this public when the SDK supports Imagen operations that take images as
   // input (upscaling / editing).
@@ -45,12 +43,10 @@ extension ImagenInlineImage: ImagenImageRepresentable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenInlineImage: Equatable {}
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension ImagenInlineImage: Decodable {
   enum CodingKeys: CodingKey {
     case mimeType
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenModel.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenModel.swift
index 51a59796de6..1999c409ad4 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenModel.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenModel.swift
@@ -22,7 +22,6 @@ import Foundation
 /// documentation](https://firebase.google.com/docs/vertex-ai/generate-images-imagen?platform=ios)
 /// for more details about the image generation capabilities offered by the Imagen model in the
 /// Firebase AI SDK SDK.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class ImagenModel {
   /// Model name prefix to identify Imagen models.
   static let imagenModelNamePrefix = "imagen-"
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenPersonFilterLevel.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenPersonFilterLevel.swift
index 8664c502617..c458191ece9 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenPersonFilterLevel.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenPersonFilterLevel.swift
@@ -17,7 +17,6 @@
 /// See the
 /// [`personGeneration`](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/imagen-api#parameter_list)
 /// documentation for more details.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenPersonFilterLevel: ProtoEnum {
   enum Kind: String {
     case blockAll = "dont_allow"
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetyFilterLevel.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetyFilterLevel.swift
index 43fe1ad59ad..162dafed2c6 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetyFilterLevel.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetyFilterLevel.swift
@@ -22,7 +22,6 @@
 /// documentation and the [Responsible AI and usage
 /// guidelines](https://cloud.google.com/vertex-ai/generative-ai/docs/image/responsible-ai-imagen#safety-filters)
 /// for more details.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenSafetyFilterLevel: ProtoEnum, Sendable {
   enum Kind: String {
     case blockLowAndAbove = "block_low_and_above"
diff --git a/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetySettings.swift b/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetySettings.swift
index 9c10faf4282..e3fcf881d8a 100644
--- a/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetySettings.swift
+++ b/FirebaseAI/Sources/Types/Public/Imagen/ImagenSafetySettings.swift
@@ -19,7 +19,6 @@ import Foundation
 /// See the [Responsible AI and usage
 /// guidelines](https://cloud.google.com/vertex-ai/generative-ai/docs/image/responsible-ai-imagen#config-safety-filters)
 /// for more details.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ImagenSafetySettings {
   let safetyFilterLevel: ImagenSafetyFilterLevel?
   let personFilterLevel: ImagenPersonFilterLevel?
diff --git a/FirebaseAI/Sources/Types/Public/Live/AudioTranscriptionConfig.swift b/FirebaseAI/Sources/Types/Public/Live/AudioTranscriptionConfig.swift
index 365afebc5da..ed3d23bc0d5 100644
--- a/FirebaseAI/Sources/Types/Public/Live/AudioTranscriptionConfig.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/AudioTranscriptionConfig.swift
@@ -18,7 +18,6 @@
 /// While there are not currently any options, this will likely change in the future. For now, just
 /// providing an instance of this struct will enable audio transcriptions for the corresponding
 /// input or output fields.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct AudioTranscriptionConfig: Sendable {
   let audioTranscriptionConfig: BidiAudioTranscriptionConfig
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveAudioTranscription.swift b/FirebaseAI/Sources/Types/Public/Live/LiveAudioTranscription.swift
index 76dc112ee03..b56e40c7ce3 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveAudioTranscription.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveAudioTranscription.swift
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 /// Text transcription of some audio form during a live interaction with the model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveAudioTranscription: Sendable {
   let transcript: BidiGenerateContentTranscription
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveGenerationConfig.swift b/FirebaseAI/Sources/Types/Public/Live/LiveGenerationConfig.swift
index c7033567a91..1302d1be31f 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveGenerationConfig.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveGenerationConfig.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Configuration options for live content generation.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveGenerationConfig: Sendable {
   let bidiGenerationConfig: BidiGenerationConfig
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveGenerativeModel.swift b/FirebaseAI/Sources/Types/Public/Live/LiveGenerativeModel.swift
index 3a8236cb1d5..7ba1bb0ac72 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveGenerativeModel.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveGenerativeModel.swift
@@ -18,7 +18,6 @@ import Foundation
 /// various input types, supporting bidirectional streaming.
 ///
 /// You can create a new session via ``LiveGenerativeModel/connect()``.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public final class LiveGenerativeModel {
   let modelResourceName: String
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveServerContent.swift b/FirebaseAI/Sources/Types/Public/Live/LiveServerContent.swift
index 15a8b310cf6..c770dc0579d 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveServerContent.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveServerContent.swift
@@ -17,7 +17,6 @@
 ///
 /// Content is generated as quickly as possible, and not in realtime. Clients
 /// may choose to buffer and play it out in realtime.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveServerContent: Sendable {
   let serverContent: BidiGenerateContentServerContent
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveServerGoingAwayNotice.swift b/FirebaseAI/Sources/Types/Public/Live/LiveServerGoingAwayNotice.swift
index 981ddf0c251..bafe3dc2882 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveServerGoingAwayNotice.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveServerGoingAwayNotice.swift
@@ -17,7 +17,6 @@ import Foundation
 /// Server will not be able to service client soon.
 ///
 /// To  learn more about session limits,  see the docs on [Maximum session duration](https://cloud.google.com/vertex-ai/generative-ai/docs/model-reference/multimodal-live#maximum-session-duration)\.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveServerGoingAwayNotice: Sendable {
   let goAway: GoAway
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveServerMessage.swift b/FirebaseAI/Sources/Types/Public/Live/LiveServerMessage.swift
index af6caca90c1..e164a3e07b1 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveServerMessage.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveServerMessage.swift
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 /// Update from the  server, generated from the model in response to client messages.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveServerMessage: Sendable {
   let serverMessage: BidiGenerateContentServerMessage
@@ -47,7 +46,6 @@ public struct LiveServerMessage: Sendable {
 
 // MARK: - Internal parsing
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 extension LiveServerMessage {
   init?(from serverMessage: BidiGenerateContentServerMessage) {
@@ -60,7 +58,6 @@ extension LiveServerMessage {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 extension LiveServerMessage.Payload {
   init?(from serverMessage: BidiGenerateContentServerMessage.MessageType) {
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCall.swift b/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCall.swift
index 6c55ee5ff4c..b61f0c2dd65 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCall.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCall.swift
@@ -16,7 +16,6 @@
 ///
 /// The client should return matching ``FunctionResponsePart``, where the
 /// ``FunctionResponsePart/functionId`` fields correspond to individual ``FunctionCallPart``s.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 public struct LiveServerToolCall: Sendable {
   let serverToolCall: BidiGenerateContentToolCall
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCallCancellation.swift b/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCallCancellation.swift
index 1572c30c5bc..34265a227a7 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCallCancellation.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveServerToolCallCancellation.swift
@@ -16,7 +16,6 @@
 ///
 /// The client does not need to send ``FunctionResponsePart``s for the cancelled
 /// ``FunctionCallPart``s.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveServerToolCallCancellation: Sendable {
   let serverToolCallCancellation: BidiGenerateContentToolCallCancellation
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveSession.swift b/FirebaseAI/Sources/Types/Public/Live/LiveSession.swift
index a7ece57bdfc..c338a2c3167 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveSession.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveSession.swift
@@ -22,7 +22,6 @@ import Foundation
 /// ``LiveSession/sendContent(_:turnComplete:)-(PartsRepresentable...,_)``).
 ///
 /// To create an instance of this class, see ``LiveGenerativeModel``.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 public final class LiveSession: Sendable {
   private let service: LiveSessionService
diff --git a/FirebaseAI/Sources/Types/Public/Live/LiveSessionErrors.swift b/FirebaseAI/Sources/Types/Public/Live/LiveSessionErrors.swift
index 59a1e920e84..454f8816303 100644
--- a/FirebaseAI/Sources/Types/Public/Live/LiveSessionErrors.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/LiveSessionErrors.swift
@@ -22,7 +22,6 @@ import Foundation
 ///
 /// Check the `NSUnderlyingErrorKey` entry in ``LiveSessionUnsupportedMessageError/errorUserInfo``
 /// for the error that caused this.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveSessionUnsupportedMessageError: Error, Sendable, CustomNSError {
   let underlyingError: Error
@@ -43,7 +42,6 @@ public struct LiveSessionUnsupportedMessageError: Error, Sendable, CustomNSError
 ///
 /// Check the `NSUnderlyingErrorKey` entry in ``LiveSessionLostConnectionError/errorUserInfo`` for
 /// the error that caused this.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveSessionLostConnectionError: Error, Sendable, CustomNSError {
   let underlyingError: Error
@@ -64,7 +62,6 @@ public struct LiveSessionLostConnectionError: Error, Sendable, CustomNSError {
 ///
 /// Check the `NSUnderlyingErrorKey` entry in ``LiveSessionUnexpectedClosureError/errorUserInfo``
 /// for the error that caused this.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveSessionUnexpectedClosureError: Error, Sendable, CustomNSError {
   let underlyingError: WebSocketClosedError
@@ -88,7 +85,6 @@ public struct LiveSessionUnexpectedClosureError: Error, Sendable, CustomNSError
 ///
 /// Check the `NSUnderlyingErrorKey` entry in ``LiveSessionSetupError/errorUserInfo`` for the error
 /// that caused this.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct LiveSessionSetupError: Error, Sendable, CustomNSError {
   let underlyingError: Error
diff --git a/FirebaseAI/Sources/Types/Public/Live/SpeechConfig.swift b/FirebaseAI/Sources/Types/Public/Live/SpeechConfig.swift
index a8e291d62f3..f715b2ff396 100644
--- a/FirebaseAI/Sources/Types/Public/Live/SpeechConfig.swift
+++ b/FirebaseAI/Sources/Types/Public/Live/SpeechConfig.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Configuration for controlling the voice of the model during conversation.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, *)
 @available(watchOS, unavailable)
 public struct SpeechConfig: Sendable {
   let speechConfig: BidiSpeechConfig
diff --git a/FirebaseAI/Sources/Types/Public/Part.swift b/FirebaseAI/Sources/Types/Public/Part.swift
index 379ba6e6a59..df492c7f75d 100644
--- a/FirebaseAI/Sources/Types/Public/Part.swift
+++ b/FirebaseAI/Sources/Types/Public/Part.swift
@@ -17,7 +17,6 @@ import Foundation
 /// A discrete piece of data in a media format interpretable by an AI model.
 ///
 /// Within a single value of ``Part``, different data types may not mix.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public protocol Part: PartsRepresentable, Codable, Sendable, Equatable {
   /// Indicates whether this `Part` is a summary of the model's internal thinking process.
   ///
@@ -28,7 +27,6 @@ public protocol Part: PartsRepresentable, Codable, Sendable, Equatable {
 }
 
 /// A text part containing a string value.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct TextPart: Part {
   /// Text value.
   public let text: String
@@ -61,7 +59,6 @@ public struct TextPart: Part {
 ///  see [input files and requirements
 ///  ](https://firebase.google.com/docs/vertex-ai/input-file-requirements#provide-file-as-inline-data)
 ///  for more details and size limits.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct InlineDataPart: Part {
   let inlineData: InlineData
   let _isThought: Bool?
@@ -102,7 +99,6 @@ public struct InlineDataPart: Part {
 }
 
 /// File data stored in Cloud Storage for Firebase, referenced by URI.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FileDataPart: Part {
   let fileData: FileData
   let _isThought: Bool?
@@ -133,7 +129,6 @@ public struct FileDataPart: Part {
 }
 
 /// A predicted function call returned from the model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FunctionCallPart: Part {
   let functionCall: FunctionCall
   let _isThought: Bool?
@@ -190,7 +185,6 @@ public struct FunctionCallPart: Part {
 /// Contains a string representing the `FunctionDeclaration.name` and a structured JSON object
 /// containing any output from the function is used as context to the model. This should contain the
 /// result of a ``FunctionCallPart`` made based on model prediction.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct FunctionResponsePart: Part {
   let functionResponse: FunctionResponse
   let _isThought: Bool?
@@ -241,7 +235,6 @@ public struct FunctionResponsePart: Part {
 }
 
 /// A part containing code that was executed by the model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ExecutableCodePart: Part {
   /// The language of the code in an ``ExecutableCodePart``.
   public struct Language: Sendable, Equatable, CustomStringConvertible {
@@ -296,7 +289,6 @@ public struct ExecutableCodePart: Part {
 }
 
 /// The result of executing code.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct CodeExecutionResultPart: Part {
   /// The outcome of a code execution.
   public struct Outcome: Sendable, Equatable, CustomStringConvertible {
diff --git a/FirebaseAI/Sources/Types/Public/ResponseModality.swift b/FirebaseAI/Sources/Types/Public/ResponseModality.swift
index 1a826df3374..080dbf89ec9 100644
--- a/FirebaseAI/Sources/Types/Public/ResponseModality.swift
+++ b/FirebaseAI/Sources/Types/Public/ResponseModality.swift
@@ -23,7 +23,6 @@ import Foundation
 ///
 /// > Important: Support for each response modality, or combination of modalities, depends on the
 /// > model.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct ResponseModality: EncodableProtoEnum, Sendable, Equatable {
   enum Kind: String {
     case text = "TEXT"
diff --git a/FirebaseAI/Sources/Types/Public/Schema.swift b/FirebaseAI/Sources/Types/Public/Schema.swift
index ab2fc7f4dd6..b288906cf73 100644
--- a/FirebaseAI/Sources/Types/Public/Schema.swift
+++ b/FirebaseAI/Sources/Types/Public/Schema.swift
@@ -18,10 +18,8 @@ import Foundation
 ///
 /// These types can be objects, but also primitives and arrays. Represents a select subset of an
 /// [OpenAPI 3.0 schema object](https://spec.openapis.org/oas/v3.0.3#schema).
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public final class Schema: Sendable {
   /// Modifiers describing the expected format of a string `Schema`.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct StringFormat: EncodableProtoEnum {
     // This enum is currently only used to conform `StringFormat` to `ProtoEnum`, which requires
     // `associatedtype Kind: RawRepresentable<String>`.
@@ -39,7 +37,6 @@ public final class Schema: Sendable {
   }
 
   /// Modifiers describing the expected format of an integer `Schema`.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public struct IntegerFormat: EncodableProtoEnum, Sendable {
     enum Kind: String {
       case int32
@@ -462,7 +459,6 @@ public final class Schema: Sendable {
 
 // MARK: - Codable Conformance
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension Schema: Encodable {
   enum CodingKeys: String, CodingKey {
     case dataType = "type"
diff --git a/FirebaseAI/Sources/Types/Public/StructuredOutput/GeneratedContent.swift b/FirebaseAI/Sources/Types/Public/StructuredOutput/GeneratedContent.swift
index da942933470..72ca5379070 100644
--- a/FirebaseAI/Sources/Types/Public/StructuredOutput/GeneratedContent.swift
+++ b/FirebaseAI/Sources/Types/Public/StructuredOutput/GeneratedContent.swift
@@ -26,7 +26,6 @@
       .GeneratedContentProtocol {}
   #endif // canImport(FoundationModels)
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public extension FirebaseAI {
     /// Structured content generated by a model.
     ///
@@ -203,7 +202,6 @@
     }
   }
 
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   public extension FirebaseAI.GeneratedContent {
     /// The kinds of values that can be represented by generated content.
     ///
diff --git a/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationID.swift b/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationID.swift
index cfc8ee6f62c..adf8689378b 100644
--- a/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationID.swift
+++ b/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationID.swift
@@ -17,7 +17,6 @@ import Foundation
   import struct FoundationModels.GenerationID
 #endif // canImport(FoundationModels)
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public extension FirebaseAI {
   /// An identifier for a specific generation.
   ///
@@ -71,7 +70,6 @@ public extension FirebaseAI {
   extension FoundationModels.GenerationID: FirebaseAI.GenerationID.GenerationIDProtocol {}
 #endif // canImport(FoundationModels)
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FirebaseAI.GenerationID: Equatable {
   public static func == (lhs: FirebaseAI.GenerationID, rhs: FirebaseAI.GenerationID) -> Bool {
     guard lhs.responseID == rhs.responseID else {
@@ -90,7 +88,6 @@ extension FirebaseAI.GenerationID: Equatable {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FirebaseAI.GenerationID: Hashable {
   public func hash(into hasher: inout Hasher) {
     hasher.combine(responseID)
diff --git a/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationSchema.swift b/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationSchema.swift
index 64847c8beb4..2a98114c3e3 100644
--- a/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationSchema.swift
+++ b/FirebaseAI/Sources/Types/Public/StructuredOutput/GenerationSchema.swift
@@ -25,7 +25,6 @@ import Foundation
     .GenerationSchemaProtocol {}
 #endif // canImport(FoundationModels)
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public extension FirebaseAI {
   struct GenerationSchema: Sendable {
     protocol GenerationSchemaProtocol: Sendable, Codable, CustomDebugStringConvertible {}
diff --git a/FirebaseAI/Sources/Types/Public/URLContextMetadata.swift b/FirebaseAI/Sources/Types/Public/URLContextMetadata.swift
index 5ff671f68eb..10f560096ec 100644
--- a/FirebaseAI/Sources/Types/Public/URLContextMetadata.swift
+++ b/FirebaseAI/Sources/Types/Public/URLContextMetadata.swift
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 /// Metadata related to the ``Tool/urlContext()`` tool.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct URLContextMetadata: Sendable, Hashable {
   /// List of URL metadata used to provide context to the Gemini model.
   public let urlMetadata: [URLMetadata]
@@ -21,7 +20,6 @@ public struct URLContextMetadata: Sendable, Hashable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension URLContextMetadata: Decodable {
   enum CodingKeys: CodingKey {
     case urlMetadata
diff --git a/FirebaseAI/Sources/Types/Public/URLMetadata.swift b/FirebaseAI/Sources/Types/Public/URLMetadata.swift
index 50ee16a7e86..1873105404a 100644
--- a/FirebaseAI/Sources/Types/Public/URLMetadata.swift
+++ b/FirebaseAI/Sources/Types/Public/URLMetadata.swift
@@ -15,7 +15,6 @@
 import Foundation
 
 /// Metadata for a single URL retrieved by the ``Tool/urlContext()`` tool.
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 public struct URLMetadata: Sendable, Hashable {
   /// Status of the URL retrieval.
   public struct URLRetrievalStatus: DecodableProtoEnum, Hashable {
@@ -58,7 +57,6 @@ public struct URLMetadata: Sendable, Hashable {
 
 // MARK: - Codable Conformances
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension URLMetadata: Decodable {
   enum CodingKeys: String, CodingKey {
     case retrievedURL = "retrievedUrl"
diff --git a/FirebaseAI/Tests/Unit/APITests.swift b/FirebaseAI/Tests/Unit/APITests.swift
index d6e870f42b7..8e47a6ffafa 100644
--- a/FirebaseAI/Tests/Unit/APITests.swift
+++ b/FirebaseAI/Tests/Unit/APITests.swift
@@ -21,7 +21,6 @@ import XCTest
   import UIKit // For UIImage extensions.
 #endif
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class APITests: XCTestCase {
   func codeSamples() async throws {
     let app = FirebaseApp.app()
diff --git a/FirebaseAI/Tests/Unit/ChatTests.swift b/FirebaseAI/Tests/Unit/ChatTests.swift
index b2e43ba610c..3648f7d6ec4 100644
--- a/FirebaseAI/Tests/Unit/ChatTests.swift
+++ b/FirebaseAI/Tests/Unit/ChatTests.swift
@@ -18,7 +18,7 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class ChatTests: XCTestCase {
   let modelName = "test-model-name"
   let modelResourceName = "projects/my-project/locations/us-central1/models/test-model-name"
diff --git a/FirebaseAI/Tests/Unit/Fakes/AppCheckInteropFake.swift b/FirebaseAI/Tests/Unit/Fakes/AppCheckInteropFake.swift
index 81b6ac1bb7c..505064482c5 100644
--- a/FirebaseAI/Tests/Unit/Fakes/AppCheckInteropFake.swift
+++ b/FirebaseAI/Tests/Unit/Fakes/AppCheckInteropFake.swift
@@ -15,7 +15,6 @@
 import FirebaseAppCheckInterop
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 class AppCheckInteropFake: NSObject, AppCheckInterop {
   /// The placeholder token value returned when an error occurs
   static let placeholderTokenValue = "placeholder-token"
diff --git a/FirebaseAI/Tests/Unit/Fakes/AuthInteropFake.swift b/FirebaseAI/Tests/Unit/Fakes/AuthInteropFake.swift
index a2f6f0eb755..ba216980c22 100644
--- a/FirebaseAI/Tests/Unit/Fakes/AuthInteropFake.swift
+++ b/FirebaseAI/Tests/Unit/Fakes/AuthInteropFake.swift
@@ -15,7 +15,6 @@
 import FirebaseAuthInterop
 import Foundation
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 class AuthInteropFake: NSObject, AuthInterop {
   let token: String?
   let error: Error?
diff --git a/FirebaseAI/Tests/Unit/GenerationConfigTests.swift b/FirebaseAI/Tests/Unit/GenerationConfigTests.swift
index 844603d7dab..da031580be1 100644
--- a/FirebaseAI/Tests/Unit/GenerationConfigTests.swift
+++ b/FirebaseAI/Tests/Unit/GenerationConfigTests.swift
@@ -16,7 +16,6 @@
 import Foundation
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class GenerationConfigTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/GenerativeAIServiceTests.swift b/FirebaseAI/Tests/Unit/GenerativeAIServiceTests.swift
index b0f7c18eb1e..910f9f6dffd 100644
--- a/FirebaseAI/Tests/Unit/GenerativeAIServiceTests.swift
+++ b/FirebaseAI/Tests/Unit/GenerativeAIServiceTests.swift
@@ -20,7 +20,7 @@ import XCTest
 @testable import FirebaseAILogic
 
 #if !os(watchOS)
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+  @available(macOS 12.0, *)
   final class GenerativeAIServiceTests: XCTestCase {
     let testModelName = "test-model"
     let testModelResourceName =
diff --git a/FirebaseAI/Tests/Unit/GenerativeModelGoogleAITests.swift b/FirebaseAI/Tests/Unit/GenerativeModelGoogleAITests.swift
index f04e1d387df..eaf7b1a1c04 100644
--- a/FirebaseAI/Tests/Unit/GenerativeModelGoogleAITests.swift
+++ b/FirebaseAI/Tests/Unit/GenerativeModelGoogleAITests.swift
@@ -19,7 +19,7 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class GenerativeModelGoogleAITests: XCTestCase {
   let testPrompt = "What sorts of questions can I ask you?"
   let safetyRatingsNegligible: [SafetyRating] = [
diff --git a/FirebaseAI/Tests/Unit/GenerativeModelVertexAICachingTests.swift b/FirebaseAI/Tests/Unit/GenerativeModelVertexAICachingTests.swift
index 50074f6d49a..eb601d29a34 100644
--- a/FirebaseAI/Tests/Unit/GenerativeModelVertexAICachingTests.swift
+++ b/FirebaseAI/Tests/Unit/GenerativeModelVertexAICachingTests.swift
@@ -19,7 +19,7 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class GenerativeModelImplicitCachingTests: XCTestCase {
   let testPrompt = "What sorts of questions can I ask you?"
   let testModelName = "test-model"
diff --git a/FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift b/FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift
index b302af838c4..368828272cb 100644
--- a/FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift
+++ b/FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift
@@ -19,7 +19,7 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class GenerativeModelVertexAITests: XCTestCase {
   let testPrompt = "What sorts of questions can I ask you?"
   let safetyRatingsNegligible: [SafetyRating] = [
@@ -1938,7 +1938,6 @@ final class GenerativeModelVertexAITests: XCTestCase {
   }
 }
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension SafetyRating: Swift.Comparable {
   public static func < (lhs: SafetyRating, rhs: SafetyRating) -> Bool {
     return lhs.category.rawValue < rhs.category.rawValue
diff --git a/FirebaseAI/Tests/Unit/JSONValueTests.swift b/FirebaseAI/Tests/Unit/JSONValueTests.swift
index 1f1beafe922..1a5276c3cde 100644
--- a/FirebaseAI/Tests/Unit/JSONValueTests.swift
+++ b/FirebaseAI/Tests/Unit/JSONValueTests.swift
@@ -15,7 +15,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class JSONValueTests: XCTestCase {
   let decoder = JSONDecoder()
   let encoder = JSONEncoder()
diff --git a/FirebaseAI/Tests/Unit/MockURLProtocol.swift b/FirebaseAI/Tests/Unit/MockURLProtocol.swift
index 6db227d5cfb..3c1852ecfd7 100644
--- a/FirebaseAI/Tests/Unit/MockURLProtocol.swift
+++ b/FirebaseAI/Tests/Unit/MockURLProtocol.swift
@@ -15,7 +15,7 @@
 import Foundation
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 class MockURLProtocol: URLProtocol, @unchecked Sendable {
   nonisolated(unsafe) static var requestHandler: ((URLRequest) throws -> (
     URLResponse,
diff --git a/FirebaseAI/Tests/Unit/PartTests.swift b/FirebaseAI/Tests/Unit/PartTests.swift
index 6c5429928d0..f6a4c92d524 100644
--- a/FirebaseAI/Tests/Unit/PartTests.swift
+++ b/FirebaseAI/Tests/Unit/PartTests.swift
@@ -17,7 +17,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class PartTests: XCTestCase {
   let decoder = JSONDecoder()
   let encoder = JSONEncoder()
diff --git a/FirebaseAI/Tests/Unit/PartsRepresentableTests.swift b/FirebaseAI/Tests/Unit/PartsRepresentableTests.swift
index 266a64b3429..8ca9af5044c 100644
--- a/FirebaseAI/Tests/Unit/PartsRepresentableTests.swift
+++ b/FirebaseAI/Tests/Unit/PartsRepresentableTests.swift
@@ -25,7 +25,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class PartsRepresentableTests: XCTestCase {
   #if !os(watchOS)
     func testModelContentFromCGImageIsNotEmpty() throws {
diff --git a/FirebaseAI/Tests/Unit/RequestOptionsTest.swift b/FirebaseAI/Tests/Unit/RequestOptionsTest.swift
index 92ab65f1f95..26b0cb3c77b 100644
--- a/FirebaseAI/Tests/Unit/RequestOptionsTest.swift
+++ b/FirebaseAI/Tests/Unit/RequestOptionsTest.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class RequestOptionsTests: XCTestCase {
   let defaultTimeout: TimeInterval = 180.0
 
diff --git a/FirebaseAI/Tests/Unit/SafetyTests.swift b/FirebaseAI/Tests/Unit/SafetyTests.swift
index b4422b61fb5..3cd98b32bf4 100644
--- a/FirebaseAI/Tests/Unit/SafetyTests.swift
+++ b/FirebaseAI/Tests/Unit/SafetyTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class SafetyTests: XCTestCase {
   let decoder = JSONDecoder()
   let encoder = JSONEncoder()
diff --git a/FirebaseAI/Tests/Unit/Snippets/ChatSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/ChatSnippets.swift
index 67bd5cb9a4a..95d75dde6ec 100644
--- a/FirebaseAI/Tests/Unit/Snippets/ChatSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/ChatSnippets.swift
@@ -19,7 +19,7 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class ChatSnippets: XCTestCase {
   lazy var model = FirebaseAI.firebaseAI().generativeModel(modelName: "gemini-2.0-flash")
 
diff --git a/FirebaseAI/Tests/Unit/Snippets/CloudStorageSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/CloudStorageSnippets.swift
index 3d04e156312..b7172133e7f 100644
--- a/FirebaseAI/Tests/Unit/Snippets/CloudStorageSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/CloudStorageSnippets.swift
@@ -20,7 +20,6 @@
 
   // These CloudStorageSnippets are not currently runnable due to the GCS upload paths but are used
   // as compilation tests.
-  @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
   final class CloudStorageSnippets {
     let model: GenerativeModel! = nil
 
diff --git a/FirebaseAI/Tests/Unit/Snippets/CountTokensSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/CountTokensSnippets.swift
index 37c4f7e3c04..80facfaccf7 100644
--- a/FirebaseAI/Tests/Unit/Snippets/CountTokensSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/CountTokensSnippets.swift
@@ -19,7 +19,6 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class CountTokensSnippets: XCTestCase {
   let bundle = BundleTestUtil.bundle()
   lazy var model = FirebaseAI.firebaseAI().generativeModel(modelName: "gemini-2.0-flash")
diff --git a/FirebaseAI/Tests/Unit/Snippets/FunctionCallingSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/FunctionCallingSnippets.swift
index dac1dea76ba..d25adf2a56f 100644
--- a/FirebaseAI/Tests/Unit/Snippets/FunctionCallingSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/FunctionCallingSnippets.swift
@@ -19,7 +19,6 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class FunctionCallingSnippets: XCTestCase {
   override func setUpWithError() throws {
     try FirebaseApp.configureDefaultAppForSnippets()
diff --git a/FirebaseAI/Tests/Unit/Snippets/LiveSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/LiveSnippets.swift
index 6b183d958b4..1ce78df8da6 100644
--- a/FirebaseAI/Tests/Unit/Snippets/LiveSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/LiveSnippets.swift
@@ -19,7 +19,6 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 final class LiveSnippets: XCTestCase {
   override func setUpWithError() throws {
diff --git a/FirebaseAI/Tests/Unit/Snippets/MultimodalSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/MultimodalSnippets.swift
index 7e8af1e3882..29e1e5846b6 100644
--- a/FirebaseAI/Tests/Unit/Snippets/MultimodalSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/MultimodalSnippets.swift
@@ -23,7 +23,7 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class MultimodalSnippets: XCTestCase {
   let bundle = BundleTestUtil.bundle()
   lazy var model = FirebaseAI.firebaseAI(backend: .vertexAI()).generativeModel(
diff --git a/FirebaseAI/Tests/Unit/Snippets/StructuredOutputSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/StructuredOutputSnippets.swift
index 17c426c3651..4d886491862 100644
--- a/FirebaseAI/Tests/Unit/Snippets/StructuredOutputSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/StructuredOutputSnippets.swift
@@ -19,7 +19,6 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class StructuredOutputSnippets: XCTestCase {
   override func setUpWithError() throws {
     try FirebaseApp.configureDefaultAppForSnippets()
diff --git a/FirebaseAI/Tests/Unit/Snippets/TextSnippets.swift b/FirebaseAI/Tests/Unit/Snippets/TextSnippets.swift
index 47ee865585d..4110ef90dd3 100644
--- a/FirebaseAI/Tests/Unit/Snippets/TextSnippets.swift
+++ b/FirebaseAI/Tests/Unit/Snippets/TextSnippets.swift
@@ -19,7 +19,7 @@ import XCTest
 // These snippet tests are intentionally skipped in CI jobs; see the README file in this directory
 // for instructions on running them manually.
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class TextSnippets: XCTestCase {
   lazy var model = FirebaseAI.firebaseAI().generativeModel(modelName: "gemini-2.0-flash")
 
diff --git a/FirebaseAI/Tests/Unit/TemplateChatSessionTests.swift b/FirebaseAI/Tests/Unit/TemplateChatSessionTests.swift
index 3ff5ad14ff0..dad73992eaa 100644
--- a/FirebaseAI/Tests/Unit/TemplateChatSessionTests.swift
+++ b/FirebaseAI/Tests/Unit/TemplateChatSessionTests.swift
@@ -16,7 +16,7 @@
 import FirebaseCore
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class TemplateChatSessionTests: XCTestCase {
   var model: TemplateGenerativeModel!
   var urlSession: URLSession!
diff --git a/FirebaseAI/Tests/Unit/TemplateGenerativeModelTests.swift b/FirebaseAI/Tests/Unit/TemplateGenerativeModelTests.swift
index a9994b8cf7a..6a1989dcbf9 100644
--- a/FirebaseAI/Tests/Unit/TemplateGenerativeModelTests.swift
+++ b/FirebaseAI/Tests/Unit/TemplateGenerativeModelTests.swift
@@ -16,7 +16,7 @@
 import FirebaseCore
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class TemplateGenerativeModelTests: XCTestCase {
   var urlSession: URLSession!
   var model: TemplateGenerativeModel!
diff --git a/FirebaseAI/Tests/Unit/TemplateImagenModelTests.swift b/FirebaseAI/Tests/Unit/TemplateImagenModelTests.swift
index 04712b377b8..dff1e092b32 100644
--- a/FirebaseAI/Tests/Unit/TemplateImagenModelTests.swift
+++ b/FirebaseAI/Tests/Unit/TemplateImagenModelTests.swift
@@ -15,7 +15,7 @@
 @testable import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class TemplateImagenModelTests: XCTestCase {
   var urlSession: URLSession!
   var model: TemplateImagenModel!
diff --git a/FirebaseAI/Tests/Unit/TemplateInputTests.swift b/FirebaseAI/Tests/Unit/TemplateInputTests.swift
index 2ed428be12b..018660c3d4d 100644
--- a/FirebaseAI/Tests/Unit/TemplateInputTests.swift
+++ b/FirebaseAI/Tests/Unit/TemplateInputTests.swift
@@ -15,7 +15,6 @@
 @testable import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class TemplateInputTests: XCTestCase {
   func testInitWithFloat() throws {
     let floatValue: Float = 3.14
diff --git a/FirebaseAI/Tests/Unit/TestUtilities/FirebaseAI+DefaultAPIConfig.swift b/FirebaseAI/Tests/Unit/TestUtilities/FirebaseAI+DefaultAPIConfig.swift
index 3223a2abe2e..cdc1f4ee3c3 100644
--- a/FirebaseAI/Tests/Unit/TestUtilities/FirebaseAI+DefaultAPIConfig.swift
+++ b/FirebaseAI/Tests/Unit/TestUtilities/FirebaseAI+DefaultAPIConfig.swift
@@ -14,7 +14,6 @@
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 extension FirebaseAI {
   static let defaultVertexAIAPIConfig = APIConfig(
     service: .vertexAI(endpoint: .firebaseProxyProd, location: "us-central1"),
diff --git a/FirebaseAI/Tests/Unit/TestUtilities/GenerativeModelTestUtil.swift b/FirebaseAI/Tests/Unit/TestUtilities/GenerativeModelTestUtil.swift
index ed07b25850d..1088db87ff4 100644
--- a/FirebaseAI/Tests/Unit/TestUtilities/GenerativeModelTestUtil.swift
+++ b/FirebaseAI/Tests/Unit/TestUtilities/GenerativeModelTestUtil.swift
@@ -20,7 +20,7 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 enum GenerativeModelTestUtil {
   /// Returns an HTTP request handler
   static func httpRequestHandler(forResource name: String,
diff --git a/FirebaseAI/Tests/Unit/Types/CitationMetadataTests.swift b/FirebaseAI/Tests/Unit/Types/CitationMetadataTests.swift
index 4c908813d68..524bd42e43b 100644
--- a/FirebaseAI/Tests/Unit/Types/CitationMetadataTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/CitationMetadataTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class CitationMetadataTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/CitationTests.swift b/FirebaseAI/Tests/Unit/Types/CitationTests.swift
index 1a372d8fd47..cbfc663d062 100644
--- a/FirebaseAI/Tests/Unit/Types/CitationTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/CitationTests.swift
@@ -15,7 +15,6 @@
 import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class CitationTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/GenerateContentResponseTests.swift b/FirebaseAI/Tests/Unit/Types/GenerateContentResponseTests.swift
index 1d2a86d4526..d666fd4fdb7 100644
--- a/FirebaseAI/Tests/Unit/Types/GenerateContentResponseTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/GenerateContentResponseTests.swift
@@ -15,7 +15,6 @@
 @testable import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class GenerateContentResponseTests: XCTestCase {
   let jsonDecoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/GroundingMetadataTests.swift b/FirebaseAI/Tests/Unit/Types/GroundingMetadataTests.swift
index ca5e8dc3ede..ba7ac29ea0c 100644
--- a/FirebaseAI/Tests/Unit/Types/GroundingMetadataTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/GroundingMetadataTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class GroundingMetadataTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationInstanceTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationInstanceTests.swift
index 4bebe401e55..57d61bac0a1 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationInstanceTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationInstanceTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImageGenerationInstanceTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationOutputOptionsTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationOutputOptionsTests.swift
index 9e135fa622c..568393e6808 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationOutputOptionsTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationOutputOptionsTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImageGenerationOutputOptionsTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationParametersTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationParametersTests.swift
index 0d398738111..e565fa71302 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationParametersTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImageGenerationParametersTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImageGenerationParametersTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGCSImageTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGCSImageTests.swift
index 84da2d5a300..d55c31ed00a 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGCSImageTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGCSImageTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImagenGCSImageTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationRequestTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationRequestTests.swift
index 70a98a54321..60f9b7304d8 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationRequestTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationRequestTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImagenGenerationRequestTests: XCTestCase {
   let encoder = JSONEncoder()
   let requestOptions = RequestOptions(timeout: 30.0)
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationResponseTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationResponseTests.swift
index 66e6cab4c8c..1d1c68a12bf 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationResponseTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenGenerationResponseTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImagenGenerationResponseTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenInlineImageTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenInlineImageTests.swift
index 0894b27fb44..ab01a1cb2fe 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/ImagenInlineImageTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/ImagenInlineImageTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ImagenInlineImageTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Imagen/RAIFilteredReasonTests.swift b/FirebaseAI/Tests/Unit/Types/Imagen/RAIFilteredReasonTests.swift
index 4fdfa4416c7..4b974d7c158 100644
--- a/FirebaseAI/Tests/Unit/Types/Imagen/RAIFilteredReasonTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Imagen/RAIFilteredReasonTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class RAIFilteredReasonTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Internal/APIConfigTests.swift b/FirebaseAI/Tests/Unit/Types/Internal/APIConfigTests.swift
index 79932f20e1b..dc54327018b 100644
--- a/FirebaseAI/Tests/Unit/Types/Internal/APIConfigTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Internal/APIConfigTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class APIConfigTests: XCTestCase {
   let defaultLocation = "us-central1"
   let globalLocation = "global"
diff --git a/FirebaseAI/Tests/Unit/Types/Internal/Requests/CountTokensRequestTests.swift b/FirebaseAI/Tests/Unit/Types/Internal/Requests/CountTokensRequestTests.swift
index 7c43833ed45..a410af016a6 100644
--- a/FirebaseAI/Tests/Unit/Types/Internal/Requests/CountTokensRequestTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Internal/Requests/CountTokensRequestTests.swift
@@ -17,7 +17,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class CountTokensRequestTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/InternalPartTests.swift b/FirebaseAI/Tests/Unit/Types/InternalPartTests.swift
index 3094135c5ab..90c824ee330 100644
--- a/FirebaseAI/Tests/Unit/Types/InternalPartTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/InternalPartTests.swift
@@ -15,7 +15,6 @@
 @testable import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class InternalPartTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/Live/BidiGenerateContentServerMessageTests.swift b/FirebaseAI/Tests/Unit/Types/Live/BidiGenerateContentServerMessageTests.swift
index cf3403b37a1..b2bf53ce8a8 100644
--- a/FirebaseAI/Tests/Unit/Types/Live/BidiGenerateContentServerMessageTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Live/BidiGenerateContentServerMessageTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 final class BidiGenerateContentServerMessageTests: XCTestCase {
   let decoder = JSONDecoder()
diff --git a/FirebaseAI/Tests/Unit/Types/Live/VoiceConfigTests.swift b/FirebaseAI/Tests/Unit/Types/Live/VoiceConfigTests.swift
index 3e57ce2d621..61b0473779e 100644
--- a/FirebaseAI/Tests/Unit/Types/Live/VoiceConfigTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/Live/VoiceConfigTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 @available(watchOS, unavailable)
 final class VoiceConfigTests: XCTestCase {
   let encoder = JSONEncoder()
diff --git a/FirebaseAI/Tests/Unit/Types/ModalityTokenCountTests.swift b/FirebaseAI/Tests/Unit/Types/ModalityTokenCountTests.swift
index 12a58e992bb..948ea6fabef 100644
--- a/FirebaseAI/Tests/Unit/Types/ModalityTokenCountTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/ModalityTokenCountTests.swift
@@ -15,7 +15,6 @@
 import FirebaseAILogic
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ModalityTokenCountTests: XCTestCase {
   let decoder = JSONDecoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/SchemaTests.swift b/FirebaseAI/Tests/Unit/Types/SchemaTests.swift
index a24b4048645..4494ffed630 100644
--- a/FirebaseAI/Tests/Unit/Types/SchemaTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/SchemaTests.swift
@@ -16,7 +16,6 @@ import FirebaseAILogic
 import Foundation
 import XCTest
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class SchemaTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/Types/ToolTests.swift b/FirebaseAI/Tests/Unit/Types/ToolTests.swift
index 9b5c1851ea0..0d0dd485401 100644
--- a/FirebaseAI/Tests/Unit/Types/ToolTests.swift
+++ b/FirebaseAI/Tests/Unit/Types/ToolTests.swift
@@ -16,7 +16,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class ToolTests: XCTestCase {
   let encoder = JSONEncoder()
 
diff --git a/FirebaseAI/Tests/Unit/VertexComponentTests.swift b/FirebaseAI/Tests/Unit/VertexComponentTests.swift
index 9d33df1ff50..87774e4069e 100644
--- a/FirebaseAI/Tests/Unit/VertexComponentTests.swift
+++ b/FirebaseAI/Tests/Unit/VertexComponentTests.swift
@@ -19,7 +19,6 @@ import XCTest
 
 @testable import FirebaseAILogic
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 class VertexComponentTests: XCTestCase {
   static let projectID = "test-project-id"
   static let apiKey = "test-api-key"
diff --git a/FirebaseAI/Wrapper/Tests/APITests.swift b/FirebaseAI/Wrapper/Tests/APITests.swift
index 16c963b1f0c..1938a5c9ac9 100644
--- a/FirebaseAI/Wrapper/Tests/APITests.swift
+++ b/FirebaseAI/Wrapper/Tests/APITests.swift
@@ -21,7 +21,7 @@ import XCTest
   import UIKit // For UIImage extensions.
 #endif
 
-@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
+@available(macOS 12.0, watchOS 8.0, *)
 final class APITests: XCTestCase {
   func codeSamples() async throws {
     let app = FirebaseApp.app()
diff --git a/FirebaseAILogic.podspec b/FirebaseAILogic.podspec
index 3580f8ce94e..845da2da03b 100644
--- a/FirebaseAILogic.podspec
+++ b/FirebaseAILogic.podspec
@@ -19,9 +19,9 @@ Build AI-powered apps and features with the Gemini API using the Firebase AI Log
   s.social_media_url = 'https://twitter.com/Firebase'
 
   ios_deployment_target = '15.0'
-  osx_deployment_target = '12.0'
+  osx_deployment_target = '10.15'
   tvos_deployment_target = '15.0'
-  watchos_deployment_target = '8.0'
+  watchos_deployment_target = '7.0'
 
   s.ios.deployment_target = ios_deployment_target
   s.osx.deployment_target = osx_deployment_target
diff --git a/scripts/build.sh b/scripts/build.sh
index 261c18c2157..b7dcbde0c33 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -768,13 +768,14 @@ case "$product-$platform-$method" in
       test
     ;;
 
-  # Note that the combine tests require setting the minimum iOS and tvOS version to 13.0
   *-*-spm)
     RunXcodebuild \
       -scheme $product \
       "${xcb_flags[@]}" \
-      IPHONEOS_DEPLOYMENT_TARGET=13.0 \
-      TVOS_DEPLOYMENT_TARGET=13.0 \
+      IPHONEOS_DEPLOYMENT_TARGET=15.0 \
+      MACOSX_DEPLOYMENT_TARGET=10.15 \
+      TVOS_DEPLOYMENT_TARGET=15.0 \
+      WATCHOS_DEPLOYMENT_TARGET=7.0 \
       test
     ;;