Thank you Quinn! I've added the server entitlement but but that wasn't enough, Roland plugins need read access to the "~/Library/Application Support/Roland Cloud" directory to check their authorization status :( com.apple.security.temporary-exception.files.home-relative-path.read-only /Library/Application Support/Roland Cloud/ Now I hope this exception will be accepted by the review team. Bruno

I actually said something stupid. Enabling com.apple.security.network.server works. It involved reinstalling some things. A thousand thanks!

UPDATE: Finally, I confirm that Roland Cloud plugins NEED read access to the "~/Library/Application Support/Roland Cloud/shared" directory to check their permission status! The fact is that the beta version contained these (XCode injected?) additional entitlements: com.apple.security.temporary-exception.files.absolute-path.read-only/ com.apple.security.temporary-exception.mach-lookup.global-namecom.apple.testmanagerdcom.apple.dt.testmanagerd.runnercom.apple.coresymbolicationd That is :(

Thank you Etresoft. Solved by modifying the code as follows: NSArray <AVMetadataItem *> *metadataForFormat = [track metadataForFormat:@"com.apple.quicktime.mdta"]; // for ( AVMetadataItem *item in track.metadata ) for ( AVMetadataItem *item in metadataForFormat )