I don't think it's possible to run Xcode 11 on an M1 Mac. But if you succeed, please let us know!

UIAlertView itself is deprecated. Instead, use a UIAlertController, and add an action for the button(s). Perhaps something like: let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert) alertController.addAction(UIAlertAction(title: "Some action", style: .default) { (action: UIAlertAction) - Void in // Code for button action... }) alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))