Is there any way to backup/move mail on Mojave?

Discussion in 'macOS Mojave (10.14)' started by nemofish, Apr 16, 2019.

  1. nemofish macrumors newbie


    Mar 11, 2019
    Looking to move my OS to Mojave from Sierra (new mac) but I am having trouble getting my emails over from

    I have about 80GB of email data spread over several folders, many of which have parent and child nested folders.

    It used to be that one would simply copy the /user/library/mail folder from one machine to the other but I understand this is no longer the case.

    I cannot export the mail folders as Apple recommends because this just exports an empty MBox for every parent folder and ignores all the nested ones.

    I also can't use Apple's migration tool as this also moves lots of other unwated data such as previous application preferences, desktop files etc.
  2. fisherking macrumors 604


    Jul 16, 2010
    ny somewhere
    when you export, you're not getting the parent folder with a disclosure triangle? (ie "imported mail")? and the nested folders, with content when you click the triangle? works for me...
  3. Fishrrman macrumors P6


    Feb 20, 2009
    I've got to ask:
    How does one accumulate 80gb of email?
    Once you have it, what does one DO with it?
    You couldn't possibly read all of it again...
  4. rodedwards macrumors member

    Jul 7, 2010
    Not sure if this will help ... but i had 20gb of Mail. When i click Export Mailbox - it took a long time to export - something like half an hour. It was a lot of data and the mail folder was just a part filled box if i didn't allow full time to export.
  5. Garsun macrumors regular


    Oct 20, 2009
    I just re-create my email accounts on the new computer and my Apple email accounts and IMAP accounts repopulate all the sub folders from the mail servers.
    It takes a while, but if I click on a particular message that has not been downloaded yet it bumps that message to the head of the queue and downloads it immediately.
  6. NoBoMac macrumors 68020


    Jul 1, 2014
    Shouldn't have to export anything. Bring over the old Mail folder in Library, then in Mail, File > Import Mailboxes. Either "Apple Mail" or "mbox format" option should work as deep down, Apple uses mbox format.

    That said, as @Garsun said, if an IMAP account, emails will redownload from server.
  7. rmpbklyn macrumors member


    Oct 25, 2015
    you don't state what mail service provider: verion, gmail? yahoo? outLook?, many mail service store the mail on server. If you used IMAP, you won't have to do anything unless you had decided to use POP and option to delete on pull.... If you had used POP then it's best to transfer back to the online service (then turn on IMAP) for the time being, you can then use POP again. However if your machine fails or power outage you can corrupt your mail database if you continue to use POP.

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6 April 16, 2019