If you have existing users without data stored in an app group container that uses a macOS-style app group ID, you should continue to use that macOS-style group ID. There’s no mechanism to, say, move content from that app app group container to a different app group container associated with an iOS-style app group ID. The good news is that, as of Jun 2025, these macOS-style app group IDs are authorised by your provisioning profile, which avoids a number of headaches. App Groups: macOS vs iOS: Working Towards Harmony has the details. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic:
App & System Services
SubTopic:
Core OS
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