Troubleshooting & messages · Delta Drive and Delta Trust messages
What does "Delta Drive isn't set up on this Mac yet" mean?
Short answer: Delta Drive hasn't been set up on this Mac (or setup didn't finish), so it can't be used yet. Set it up from Data Backup; retrying an interrupted setup is safe.
Delta Drive hasn't been created on this Mac yet (or setup didn't finish), so it can't be used — including as a backup destination. Nothing was lost.
Open Data Backup and set up Delta Drive. If setup says it's taking longer than expected, wait a moment and try again; trying again continues safely.