Time machine stuck on 'preparing backup' and 'encrypting'

Discussion in 'macOS Sierra (10.12)' started by igorpinto1996, Apr 6, 2018.

  1. igorpinto1996 macrumors newbie


    Apr 6, 2018
    Im trying to do a backup on my Mac, but it stuck saying 'preparing backup'.
    When I cancel the backup, its stuck saying Encrypting.

    I don't remember exactly, but I think last time I started encrypting the backup disk I cancelled it because it was taking too long.

    Is there a solution to this problem?
  2. leman macrumors G3

    Oct 14, 2008
    You can always delete the backup and start a new one. Post-entryption can take substantial amounts of time, so its best to have an encrypted backup from the start. Usually, "preparing backup" appears for a long period of time if the system can't reliably determine which files have changed and has to compare the differences — which can be a while.
  3. Rob JJ macrumors newbie

    Jan 17, 2015
    If I delete the backup, is there something special I need to do to get a new FULL backup?
  4. CoastalOR macrumors 68020


    Jan 19, 2015
    Oregon, USA
    The best way to insure a proper reset of an old TM volume is to format the TM volume for Mac OS Extended (Journaled) then Select the newly formatted volume in the Time Machine Preference pane. The selected volume will perform a full backup since the new TM volume is empty.
  5. Rob JJ macrumors newbie

    Jan 17, 2015
    Thank you...hadn't thought to do that, but makes sense

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