I have imported mailboxes from Apple Mail on an older MacBook to a new (MacOS Ventura). It worked fine so far that I get a message that the imported mailboxes now are in a new mailbox named Import in the Mail sidebar. But there is no mailbox named Import in the sidebar.
MacBook Pro 14″, macOS 13.2
From my old Mac I exported the mailbox (took just one to test) to a folder in Dropbox. Looks fine to me.
On my new Mac went to Mail/Archive and chose Import mailboxes, then followed the instruction, chose Apple Mail, and chose the file in the Dropbox folder, worked fine, and a message came up saying the the imported mailbox is in a mailbox named Import in the sidebar. All looks fine so far but I have not found any mailbox named Import. (I use Mail ver 16 on bot the computers).
Further info: I looked up Apple's instructions before trying and have, as far as I know, followed them. I have tried with 3 different mailboxes with the same result.
When you exported the mail from old mac it was in a .mbx format. When you go to Apple mail on the new Mac you need to select file from top menu then select import and then you see two choices: Apple mail and .mbx mail. You should pick .mbx and look for that file in your Dropbox. Try that and it should work.
I have tried that too. Then I get a message saying "there are no valid mbox files" (my translation from Swedish). However, when I check the files in the Dropbox folder there are 3 files, 'info.list', 'mbox', and 'table_of_contents'. For 'mbox' and 'table_of_contents', the size is 0 bytes. Maybe the files are corrupted in some way? And the issue is on exporting the mailboxes?
I tried to export to a USB memory stick instead of a Dropbox folder, that worked. So thank you for the help.
I have no idea why it did not work to export to a Dropbox folder, that would have been easier, to move the mailboxes via a USB memory stick need a bit more work but that will do. I don't know if exporting to Dropbox is a generic issue, or if the problem is Mail on my old computer. (After upgrading to Monterey there has been many functions in Mail that stopped working properly, and I could never solve them. That was one reason I bought a new Mac a bit earlier than planned).
Then the mail was not imported. Please explain the process you followed to import.
Import or export mailboxes in Mail on Mac - Apple Support
Try what's done in this animated screenshot but for the Import folder(s):
Try right clicking in the sidebar area and select 'New Mailbox', then from the list that drops down, look for one that says 'Import'.
Should show in the left column bottom
When I select 'New Mailbox' a lot of mailboxes is shown but no-one named 'Import'.
It does not show there.
No, I have tried that. When I click the plus to add a mailbox and get to the menu, there is no import folders there.
You might have to contact Customer Support at the number at the bottom of this page and get them started on the problem.
There could be an issue with Dropbox. The method you used by exporting to a thumb drive is what I was about to suggest bypassing Dropbox. Glad you finally got your mail transferred.
Import of mailboxes
