I'm experiencing crashes on my Simulator when I build and run apps using Xcode 12 and iOS 14 Simulators. Probably it crashes when Simulator's OS boots. I get alert dialogs of possibly uncaught exceptions. Many things are crashing: NewsToday2 quit unexpectedly NewsTag quit unexpectedly CalendarWidgetExtension quit unexpectedly and so on... I think there aren't more instances like that in the Forum because it fails silently for most people. But if you try to see the correspondent widgets they are all a black rectangle in the widgets screen. To see those alerts you need the CrashReporterPrefs.app that can be found inside Additional Tools for Xcode 12 at the official developers download page - https://developer.apple.com/download/more/ Set it as Developer and the check the Display alert dialog for uncaught exceptions. I don't see the direct impact of it in my app, besides an infinite auto-layout loop that I don't think has any relation with those crashes. But I wonder, what is causing the crashes?