Help with Time Machine

Discussion in 'macOS Mojave (10.14)' started by Installshield, Jul 25, 2019.

  1. Installshield macrumors newbie


    Jul 18, 2019
    Cidade de Mauá / São Paulo / Brasil
    Good morning everyone

    I've researched it and haven't found a way to prevent a particular time machine backup from being overwritten when there's no more space on the hard drive, for example a newly created clean installation of macOS.

    Thank you very much in advance
  2. NoBoMac Moderator


    Staff Member

    Jul 1, 2014
    Short of not plugging that drive in, do not believe there is a way to do what you want.
  3. CTHarrryH macrumors 68000

    Jul 4, 2012
    Have you tried manually deleting other backups so there is space on the drive?
  4. madrich macrumors 6502


    Feb 19, 2012
    World Class City of Chicago
    Opps! Be careful. If you manually delete other backups, you should delete only the oldest backup, or risk disrupting the TM logic.
  5. HDFan macrumors 65816

    Jun 30, 2007
    Turning off TM (unchecking backup automatically) doesn't work? Or if you have multiple TM disks, just removing the disk?

    Screen Shot 2019-07-25 at 7.15.37 PM.png
  6. mpainesyd macrumors 6502a


    Nov 29, 2008
    Sydney, Australia
    If there is no more room for new backups and you want to keep all old backups then it is time to start using a new backup drive, of course. There doesn't seem to be a way to keep selected archived files in the TM system. As madrich points out, TM uses a complicated logic for storing files and so changing any files could make it unusable.
    I would be investing in a new hard drive if the old files are that important. In any case it is recommended that you use at least two separate hard drives for TM, which automatically alternates between them if they are both mounted. You could even investigate copying the old backups (in full) to a new larger hard drive and see if TM recognises it and starts using it without erasing old files (until it is full).

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5 July 25, 2019