diff --git a/OpenHaystack/OpenHaystack/HaystackApp/Views/ActivityIndicator.swift b/OpenHaystack/OpenHaystack/HaystackApp/Views/ActivityIndicator.swift
index 7c42d380..06d5b403 100644
--- a/OpenHaystack/OpenHaystack/HaystackApp/Views/ActivityIndicator.swift
+++ b/OpenHaystack/OpenHaystack/HaystackApp/Views/ActivityIndicator.swift
@@ -11,7 +11,7 @@ import AppKit
 import Foundation
 import SwiftUI
 
-final class ActivityIndicator: NSViewRepresentable {
+struct ActivityIndicator: NSViewRepresentable {
 
     init(size: NSControl.ControlSize) {
         self.size = size
diff --git a/OpenHaystack/OpenHaystackMail/Info.plist b/OpenHaystack/OpenHaystackMail/Info.plist
index c3d3531f..6a85c053 100644
--- a/OpenHaystack/OpenHaystackMail/Info.plist
+++ b/OpenHaystack/OpenHaystackMail/Info.plist
@@ -178,5 +178,21 @@
 		<string>224E7F96-2099-499C-A501-63FB68C79CD2</string>
 		<string>A4B49485-0377-4FAB-8D8E-E3B8018CFC21</string>
 	</array>
+	<key>Supported13.1PluginCompatibilityUUIDs</key>
+	<array>
+		<string>25288CEF-7D9B-49A8-BE6B-E41DA6277CF3</string>
+		<string>6FF8B077-81FA-45A4-BD57-17CDE79F13A5</string>
+		<string>224E7F96-2099-499C-A501-63FB68C79CD2</string>
+		<string>A4B49485-0377-4FAB-8D8E-E3B8018CFC21</string>
+		<string>890E3F5B-9490-4828-8F3F-B6561E513FCC</string>
+	</array>
+	<key>Supported13.2PluginCompatibilityUUIDs</key>
+	<array>
+		<string>25288CEF-7D9B-49A8-BE6B-E41DA6277CF3</string>
+		<string>6FF8B077-81FA-45A4-BD57-17CDE79F13A5</string>
+		<string>224E7F96-2099-499C-A501-63FB68C79CD2</string>
+		<string>A4B49485-0377-4FAB-8D8E-E3B8018CFC21</string>
+		<string>890E3F5B-9490-4828-8F3F-B6561E513FCC</string>
+	</array>
 </dict>
 </plist>
diff --git a/README.md b/README.md
index 12c00549..0d60131b 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Therefore, the installation procedure is slightly different and requires you to
 Our plugin does not access any other private data such as emails (see [source code](OpenHaystack/OpenHaystackMail)).
 
 1. Download a precompiled binary release from our <a href="https://github.com/seemoo-lab/openhaystack/releases">GitHub page</a>.  
-   _Alternative:_ build the application from source via Xcode.
+   _Alternative:_ build the application from source via Xcode, see [here](build.md).
 2. Open OpenHaystack. This will ask you to install the Mail plugin in `~/Library/Mail/Bundle`.
 3. Open a terminal and run `sudo spctl --master-disable`, which will disable Gatekeeper and allow our Apple Mail plugin to run.
 4. Open Apple Mail. Go to _Preferences_ → _General_ → _Manage Plug-Ins..._ and activate the checkbox next to _OpenHaystackMail.mailbundle_.
diff --git a/Resources/build-build.png b/Resources/build-build.png
new file mode 100644
index 00000000..546592a7
Binary files /dev/null and b/Resources/build-build.png differ
diff --git a/Resources/build-reset-caches.png b/Resources/build-reset-caches.png
new file mode 100644
index 00000000..4181cce3
Binary files /dev/null and b/Resources/build-reset-caches.png differ
diff --git a/Resources/build-show-output.png b/Resources/build-show-output.png
new file mode 100644
index 00000000..7dee3a84
Binary files /dev/null and b/Resources/build-show-output.png differ
diff --git a/build.md b/build.md
new file mode 100644
index 00000000..af65922e
--- /dev/null
+++ b/build.md
@@ -0,0 +1,29 @@
+# How to build manually
+
+Whenever there is a new MacOS update we need to update the proper Mail and MacOS version in this [plist](OpenHaystack/OpenHaystackMail/Info.plist)
+
+## Prerequesites
+
+1. You need to have Xcode installed. Latest build as of the time of writing is Xcode 14.2 on Ventura 13.2.
+2. In Apple Mail you need to have you iCloud account to be enabled (without that it will not work ⚠️)
+3. Apple Mail preferences dialog should show you the `Manage plug-ins` button. If not you will need to run `sudo defaults write "/Library/Preferences/com.apple.mail" EnableBundles 1` and restart Mail
+
+## Steps
+
+1. Locate `OpenHaystack/OpenHaystack.xcodeproj` in Finder and open it in Xcode
+2. Xcode should load some dependencies, if this does not happen in Xcode go to `File / Packages / Reset Package Caches`
+
+   ![Reset Caches](Resources/build-reset-caches.png)
+3. Now build the project (`Prodcut / Build`)
+
+   ![Build project](Resources/build-build.png)
+4. After building navigate to the output folder by clicking `Product / Show Build Folder in Finder`
+
+   ![Show output folder](Resources/build-show-output.png)
+5. In Finder navigate to the sub-folder `Build / Products / Debug` and start `OpenHayStack` from here
+6. Acknowledge all upcoming popups but ignore the info, that there is a newer version available. When prompted install the Mail plugin with the default parameters
+7. Apple Mail should now show you the new plug-in under `Manage plug-ins`
+8. Now _close_ Mail, in the Terminal (or other shell) disable Gatekeeper `sudo spctl --master-disable`
+9. Start Mail again and now enable the OpenHaystack plugin. You should be required to restart Mail. Afterwards the plugin is enabled. Close Mail again!
+10. Re-enable Gatekeeper `sudo spctl --master-enable`
+11. Verify in OpenHaystack that you have a proper connection (upper right corner should be a green light)
\ No newline at end of file