I'm running into a similar issue on Xcode 15 beta 6 using both iOS beta 5 + 6: dyld[5404]: Symbol not found: _$s9SwiftData15PersistentModelPAAE013createBackingB0QryAaBRd__lFZ Referenced from: <03A82B7F-BA4F-3EC4-844C-B8707BA0EC32> /private/var/containers/Bundle/Application/19E5AC5E-A8D9-45BD-8BB3-E5D022E5A94C/Resplit.app/Resplit Expected in: <49E09F5C-ED41-3CA9-9F56-FEBA1FBE971D> /System/Library/Frameworks/SwiftData.framework/SwiftData