It seems that I should make my Agent also be sandboxed. Is it true the launch agent of a sandboxed app also should be sandboxed? And so as daemon?

Just declare your model as Identifiable will solve the problem.

Just try enum DayOfTheWeek: String, CaseIterable, Identifiable{ var id: String {self.rawValue} case monday = "Monday" case tuesday = "Tuesday" var description: String { switch self { case .monday: return "it's a great day to have a coffee" case .tuesday: return "..." } } } // it's a great day to have a coffee let mondayDescription: String = DayOfTheWeek.monday.description

I finally figure out the problem. It seems that applying .clipShape(...) on RecorderPlayerView will cause the problem. Just remove the line .clipShape(RoundedRectangle(cornerRadius: 8)) will solve this problem. RecorderPlayerView(playerView: playerViewModel.playerView) // .clipShape(RoundedRectangle(cornerRadius: 8)) <-- remove this line .onAppear { ... } Maybe there are some bugs in .clipShape and AVPlayerView in trimming mode.

In fact, it can not triggered on all Mac.