[v3][macOS] The cross-platform Permissions option is ignored on macOS

[Grantmartin2002]

Wails version family

v3

Exact Wails version

v3.0.0-beta.13 (also on master @ 9f2fbd3)

Operating System

macOS

Description

WebviewWindowOptions.Permissions is honoured on Linux (#5552) and on Windows through WebView2 (#5567), but has no effect on macOS. WebviewWindowDelegate is the webview's UI delegate and declares WKUIDelegate conformance, but never implements webView:requestMediaCapturePermissionForOrigin:initiatedByFrame:type:decisionHandler: — so nothing on darwin reads the map.

Capture itself still works. WKUIDelegate.h says an unimplemented method behaves as WKPermissionDecisionPrompt, so macOS acts as though every window were permanently PermissionDefault. What's lost is the other two policies: you can't drop WebKit's prompt for a window that only loads your own content, and you can't deny capture to a window that shouldn't have it.

The docs already describe this as a known limitation — permissions.mdx says the map is "currently ignored on macOS".

To Reproduce

1. Build a macOS app with NSCameraUsageDescription and NSMicrophoneUsageDescription in its Info.plist.
2. Create a window that should refuse capture:

   app.Window.NewWithOptions(application.WebviewWindowOptions{
       Permissions: map[application.PermissionType]application.Permission{
           application.PermissionMicrophone: application.PermissionDeny,
           application.PermissionCamera:     application.PermissionDeny,
       },
   })

3. Call navigator.mediaDevices.getUserMedia({audio: true, video: true}) from it.
4. WebKit prompts, and capture proceeds if the user accepts — the PermissionDeny never applies. Configured with PermissionAllow, the prompt still appears.

Found by reading the source rather than running it: git grep requestMediaCapturePermission v3/ comes back empty, and webview_window_darwin.go:209 is the only setUIDelegate:.

Expected behaviour

The three-way policy the other platforms implement, mapped onto WKPermissionDecision:

Permission	macOS decision
PermissionDefault	WKPermissionDecisionPrompt — unchanged from today
PermissionAllow	WKPermissionDecisionGrant
PermissionDeny	WKPermissionDecisionDeny

TCC still gates the device on top, so PermissionAllow removes WebKit's prompt but not the system one. Camera and microphone only, matching the current Linux scope — the other three types have no WKUIDelegate equivalent.

Additional context

#6050 implements this.

System Details

Wails CLI      v3.0.0-beta.13
Go             go1.26.2
OS             macOS 26.6.2 (25G83), darwin/arm64, Apple M4 Pro
Xcode          26.6 (17F113), cli tools 2416
CGO_ENABLED    1