Our app uses CoreNFC to scan NFC tags or you can use QR if NFC is not supported. This worked pretty well and we were able to run the app in the simulator for (ui) testing purposes. Until Xcode12 / iOS14 GM builds. In iOS13 (or lower) we wouldn't have any issues running it on a simulator. But in Xcode12 running it on a iOS14 simulator iPhone11 we would get the following: dyld: launch, loading dependent libraries DYLD_SHARED_CACHE_DIR=/Users/***/Library/Developer/CoreSimulator/Caches/dyld/19G73/com.apple.CoreSimulator.SimRuntime.iOS-14-0.18A372 DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/***/Library/Developer/Xcode/DerivedData/BeeSafe-awnlestrbvesqqbynrhmluzhbcsc/Build/Products/Debug-iphonesimulator:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSi dyld: Library not loaded: /usr/lib/libnfshared.dylib 	Referenced from: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreNFC.framework/CoreNFC 	Reason: no suitable image found.	Did find: /usr/lib/libnfshared.dylib: mach-o, but not built for platform iOS-sim That the simulator crashes makes sense to me, since the simulator can't scan NFC tags, but this is what I've done: I already linked to the CoreNFC framework and made it optional. Put #if canImport(CoreNFC) around import CoreNFC and it's underlying NFC code. Cleaning the build folder and deleting derived data. Created an empty Xcode12 project: https://github.com/basvankuijck/CoreNFCCrashProject, same result. Removed all the listed simulators and re-added one Added -weak_framework "CoreNFC" to the Other Linker Flags build setting Obviously removing any references to the CoreNFC framework by either commenting out code sections and removing the framework link, makes the crash disappear. But that's not a suitable option. Running it from Xcode12 on an iOS13 simulator 'device' works perfectly. So I can't seem to figure out what is causing this behavior