How to Erase Encrypted Backup HD

Discussion in 'Mac Basics and Help' started by ghsNick, Dec 21, 2016.

  1. ghsNick macrumors 68030


    May 25, 2010
    Hi -

    I'm trying to erase my backup HDD I was using with Time Machine and it was encrypted...every time I go to erase it in Disk Utility I get the following error message.

    Any idea on how I can erase this thing properly so I can partition?


    Attached Files:

  2. KALLT macrumors 601

    Sep 23, 2008
    Make sure that the disk is not being accessed anywhere, e.g. not in Finder or a Terminal window. Just close these windows. If that does not work, eject the disk and try it again.
  3. JohnDS macrumors 65816

    Oct 25, 2015
    Launch Disk Utility to erase the volume. However, before erasing, you need to select the disk and then choose File > Unlock “volume name”

Share This Page