finally We have a solution... for macOS 14.2 or later (but it isn't ScreenCaptureKit). you can use AudioHardwareCreateProcessTap https://developer.apple.com/documentation/coreaudio/4160724-audiohardwarecreateprocesstap . somewhat developer.apple.com doesn't have a any description, but SDK header files does. so all your need is read header file, instead of developer.apple.com/documentation or you might be want to read example source code, https://github.com/insidegui/AudioCap (note: this isn't mine project) well, it still lacks some features (on Public API), like get current permission status. If your app aren't on App Store, you might be able to use TCC private API instead, but cleary not recommended.

I found that starting from iOS 16, simply place two Text to inside of Toggle's label then it magically treated as title and subtitle! but on beta 1, spacing on these texts are smaller than line heights, so when title/subtitle has long text and wrapped, it seems weird. so I just filed as FB10196516.

you need to add INSendMessageIntent to NSUserActivityTypes in host app's Info.plist , did you add it?