Salvaging/Reimporting Old Mailboxes?
I had a hard drive failure while running Catalina. I had my 2013 iMac repaired with an internal 1 TB SSD and Big Sur loaded.
Unfortunately, I "thought" I had a Time Machine backup, but it seems it got corrupted in mid backup. Luckily, I had been operating Catalina and the OS from an external SSD bootup, and I still have that intact. Can anyone tell me where & how to retrieve my very organized mailbox and saved message structure from the old external drive and import it to the new mailbox?
There were 5 user ID's on the old system, and I only want to reimport the ones from my own. The "Import Data from Apple Mail" seems to look for everything, as soon as I select a directory.