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I compiled my app with Xcode 13 beta and am getting a bunch of runtime warnings like this. I've also noticed someone else on Twitter experiencing the same thing. Any idea what's causing this? Something with my plist file formatting? I don't use Core Data (used to long ago but don't think I have any relics of that in my project anywhere) which was my first thought when seeing NSKeyedUnarchiver. 2021-06-17 00:54:02.295892+0300 RedactedAppName[3659:1216650] [general] *** -[NSKeyedUnarchiver _warnAboutPlistType:missingInAllowedClasses:] allowed unarchiving safe plist type ''NSString' (0x1ef8aebe0) [/System/Library/Frameworks/Foundation.framework]', even though it was not explicitly included in the client allowed classes set: '{(   "'NSDate' (0x1ef8a3e30) [/System/Library/Frameworks/CoreFoundation.framework]",   "'NSDictionary' (0x1ef8a3f98) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future. 2021-06-17 00:54:02.296016+0300 RedactedAppName[3659:1216650] [general] *** -[NSKeyedUnarchiver _warnAboutPlistType:missingInAllowedClasses:] allowed unarchiving safe plist type ''NSString' (0x1ef8aebe0) [/System/Library/Frameworks/Foundation.framework]', even though it was not explicitly included in the client allowed classes set: '{(   "'NSDate' (0x1ef8a3e30) [/System/Library/Frameworks/CoreFoundation.framework]",   "'NSDictionary' (0x1ef8a3f98) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future. 2021-06-17 00:54:02.448722+0300 RedactedAppName[3659:1216462] [general] *** -[NSKeyedUnarchiver _warnAboutPlistType:missingInAllowedClasses:] allowed unarchiving safe plist type ''NSString' (0x1ef8aebe0) [/System/Library/Frameworks/Foundation.framework]', even though it was not explicitly included in the client allowed classes set: '{(   "'NSDate' (0x1ef8a3e30) [/System/Library/Frameworks/CoreFoundation.framework]",   "'NSDictionary' (0x1ef8a3f98) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future.

I'm in the middle of updating my app to only support iOS 14+ and am moving to the new @main app structure. I'm trying to figure out how to deal with code in my App and Scene Delegate: mainly code related to Core Data and CloudKit persistent container. Stuff like lazy var persistentContainer: NSPersistentCloudKitContainer = {...} and  let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext context.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy context.automaticallyMergesChangesFromParent = true Where do I put this kind of stuff in the new @main world?