Is it a bad idea to use the App Group ID as an UserDefaults' suiteName? This seems to be a general aproach I see on code bases out there. When using the App Groups ID as a UserDefaults suiteName: extension UserDefaults { static let shared = UserDefaults(suiteName: "group.com.example.app")! } I'm getting this warning/error: [User Defaults] Couldn't read values in CFPrefsPlistSource<0x000000000> (Domain: group.com.example.app, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null), Contents Need Refresh: Yes): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsd An App Groups ID with the same String ("group.com.example.app") is defined in Signing & Capabilities > App Groups. If I change the suitName or change the App Groups ID the warning goes away. Is it not a good idea to use the App Group ID as an UserDefaults' suiteName? Does anybody had the same problem? I searched everywhere about this and couldn't find an answer if I can just ignore this.