I develop for macOS, the label is not vibrancy

Is not a issue, in macOS, there is an option (System Preferences, Accessibility, Flash the screen when an alert sound...) I just want to override this in my app I don't want the flash screen, its call kSystemSoundID_UserPreferredAlert

MPVolumeView is not included in Cocoa framework I read about AVRoutePickerView but is not show all available devices for me.

let routePickerView = AVRoutePickerView.init(frame: NSRect(x: 0.0, y: 0.0, width: 200.0, height: 200.0))     self.view.addSubview(routePickerView)

Ok, that happened because I used a custom NSWindow     let visualEffect = NSVisualEffectView() window?.contentView?.addSubview(visualEffect) how can I fix it? Thanks!

Same