Our music player plays library and Apple Music catalog content with MusicKit's ApplicationMusicPlayer. On the Mac, we want a volume slider that changes only our app's playback level, like the slider in Music.app. We found no supported way to do this: ApplicationMusicPlayer and MusicPlayer have no volume property. The audio plays in com.apple.MediaPlayer.RemotePlayerService, not in our process, so we cannot change the stream level. MPVolumeView and the deprecated MPMusicPlayerController.volume control the system output volume, not the app's level. AVPlayer cannot play Apple Music catalog content. Questions: Is there a supported API to set the playback volume of ApplicationMusicPlayer on macOS or Mac Catalyst? If there is none, what does Apple recommend for Mac apps that need an app-level volume control for MusicKit playback?

In Apple Ads UI -> Ad Group -> Ads -> Default Ad, there is an Ad Language dropdown. In Campaign Management API v5, I can’t find any equivalent field on Ad Group create/read/update to set or retrieve that value. I would like to know: whether this ad language setting is exposed via API at all, and if yes, which endpoint/object/field maps to that UI control? https://developer.apple.com/documentation/apple_ads/get-all-ads

My use case is a Repeat Timer app. The user can configure a repeating timer, say: 8 minutes with 3 sets So I would like to configure either 3 alarms (8mins, 16mins, 24mins) or a repeating alarm (8mins every 3 mins) BUT... I would like the first and second alarms to break through but only for 5 seconds for example, and then stop (so the user doesn't need to tap the screen to silence the alarm). I don't think this is possible after reading the API docs, but am asking the question anyway. Thanks for any advice or guidance here, and happy WWDC!