TimeMachine after OS upgrade

Discussion in 'macOS Sierra (10.12)' started by danqi, Aug 15, 2017.

  1. danqi macrumors member

    Sep 14, 2010
    I have recently upgraded from Mavericks to Sierra. Before the upgrade I turned off TimeMachine.

    Can I just turn it back on now or should I start over by erasing the drive and letting TimeMachine start fresh?
  2. jbarley macrumors 68040


    Jul 1, 2006
    Vancouver Island
    If, Time Machine is your only backup - the only way you have of going back to a working system should you decide Sierra is not what you want.
    Then I'd suggest you keep it around for awhile, at least until you are sure you want to go with Sierra.
    Now if by chance you've already decided that Sierra is what you want, then go ahead a erase the HDD and start a fresh TM backup, keeping in mind that you just burnt that bridge.
  3. danqi thread starter macrumors member

    Sep 14, 2010
    I do have other pre-Sierra backups. For me the question is rather if I want to keep the ability to roll files back to different states (e.g. 1 month ago, 5 months ago, and so on) or if it is cleaner to start over.
  4. Taz Mangus macrumors 68040

    Taz Mangus

    Mar 10, 2011
    You should be able to just turn Time Machine on. Keep in mind that when you do turn Time Machine on again, Tine Machine will probably think that everything needs to be backed up again. So your previous backups should be fine.
  5. Boyd01 macrumors 68040


    Feb 21, 2012
    New Jersey Pine Barrens
    I updated my MacBook Air to Sierra a couple weeks ago. Did not change anything with Time Machine, it still automatically backs up to a 2TB Time Capsule and I also have an external drive that I occasionally connect. Everything works fine, although it took a really long time to do the initial backups after upgrading.

    I would not want to rely solely on Time Machine backups however, I have several bootable Carbon Copy clones (from before an after the upgrade) as well.
  6. zorinlynx macrumors 603


    May 31, 2007
    Florida, USA
    Hard drives are fairly cheap; you should have at least two time machine backups of your system anyway.

    Switch to the second backup disk for the new install; once you have a few days of history you can safely start over on the old disk if you want, or just use them alternately from then on.

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