Thank you very much for this code, I tried with ChatGPT and a YouTube video to create App Groups but only with you I could do the migration. The only problem, which is still small, is that the following line gave me an error because the database was not found: init(inMemory: Bool = false) { container = NSPersistentCloudKitContainer(name: "iCloud.com.yourDomain.YourAppName’") It should be only with the model name, ie: NSPersistentCloudKitContainer(name: "YourAppName’") Rodrigo