Xcode Version 16.0 (16A242d) [_NSFullScreenMenuBarCompanionController layoutTitlebarViews] last stack error :Thread 1: EXC_BAD_ACCESS (code=1, address=0x6b414b754e0) A bad access to memory terminated the process. Presenting a fullscreen viewController will cause crash in TabBarController when running iOS App in Mac(Designed by iPad) A demo gonna recreate this crash. Demo is in attachment in Feedback issue (FB15183434). Or you can try yourself. Create a TabBarController Try to present a view controller as fullscreen mode. Crash will be occurred. #warning(": Bug is here when presenting a fullscreen view controller from a tab bar managed view controller,") let vc = UIViewController() vc.modalPresentationStyle = .fullScreen present(vc, animated: true)