Mail import fails repeatedly

Hi,

Sorry, I’m not importing from the corrupted drive. I’ve migrated the contents of an (apparently-uncorrupted) time machine backup to a new disk and booted on that disk. All is fine until I try to open Mail and on first open, Mail says it needs to “import” the already-present mail data into the latest format. (This is odd given that I don’t think the OS version changed....) And that process keeps failing.

Some of the messages are local only — e.g., archived — rather than IMAP.

Thanks,

Mike

Can you boot in safe mode off of an external drive?

Mail does not crash with no internet but it again wants to run an "import" workflow.

I cannot reach the Mail's "mailbox" menu because I cannot successfully make it past the import workflow.

Thank you! This worked!

I tried unchecking "Mail" from a handful of the accounts, then re-opening the Mail app. It went through the same lengthy import/upgrade process (because I had left as checked a main account with a large quantity of mail in it), but at the end it completed successfully and Mail actually opened. I then re-enabled the other accounts.

Notably all the "on my mac" mail seems to be intact (though Mail seems to have taken it upon itself to mark a bunch of it as "junk", but kept it in the correct folder at least.)

Thanks!

Unfortunately that’s not possible. Lots of new messages since then, scattered across many imap directories and multiple accounts. And I can’t even see when the mail on the Mac ends...