I recently updated to Big Sur 11.0 beta. I am aso on Xcode 12.1. I have had this project for at least 6 months now with no issues. Yesterday it was working on now today when I try to launch the app the build succeeds and then the app never launches and it goes to a variety of different dyld' windows dylddyld::loadPhase5check: dyldstat64: dyldImageLoaderMachOCompressed::rebase: dyldgetattrlist: the most common of which that pops up when building is dyld_dyld_debugger_notification: and dylddyldstart: I have tried googling these and I am at a complete loss. I have no idea what to do or how to fix this. I tried turning off "Generate Debug Symbols" in the build settings and then i cleaned my build folder and recompiled and that worked for about 10 minute and then stopped out of no where again. I have no idea whats going on but this seems like a pretty serious Xcode bug.