I'll have to leave the Apple Script project to someone else. But if you want to try Squishy's suggestion, make a backup copy of the entire Mail folder and move it to the Desktop (Option-drag to the Desktop.) Then you can always restore it later if it doesn't work out. Same with Address Book.
Mail Import will import to a whole new Mailbox called Import1, Import2, etc.
So, on the flash drive, I have the 753 remaining messages in a copy of POP-my.name@mail.ISP.server
/INBOX.mbox/Messages. You're saying that Mail
would import those 753 messages 'as is', to a new Mailbox Import1? And from there of course, I could just drag and drop them to my main mailbox within Mail
. Have I got that correct
? (No. It didn't work. Mail asked for files in "mbox" format, but whichever level I selected (from POP, through INBOX, to Messages, or even the message files themselves), Mail just kept coming back with an error telling me it couldn't find the mbox format. And it's no good archiving the entire mailbox as I've now moved between 1500-2000 messages over, all I've got left is the 750+)
BTW I solved the Address Book thing very easily - I just did Export > VCards (having selected every card first). Then the target Address Book offered to import all of them, but also gave me several options where cards appeared to be the same (Keep Old, Keep New, Keep Both, or Merge) which was very handy.