GCMouse.DidStopBeingCurrentMessage
A message that posts after a mouse stops being the most recently used mouse.
Declaration
struct DidStopBeingCurrentMessageOverview
Use the .didStopBeingCurrent identifier with NotificationCenter to listen for this message.
let observation = NotificationCenter.default.addObserver(of: GCMouse.self, for: .didStopBeingCurrent) { message in
let mouse = message.mouse
}