I made use of Time Machine to restore my Mac's OS and data to a new drive after the old one failed. Time Machine doesn't seem to recognize that the new drive and the back ups are related. Is there a method to connect the two, or do I need to wipe that drive containing the old history, and just start a new TM backup?

1 Answer 1


The Time Machine backups became disassociated with the new drive because of the change to the UUID of the new drive. With a little usage of tmutil in Terminal following the directions here, you can rebuild the association of the Time Machine backups to the new drive.

  • I appreciate the response. That terminal command isn't available in 10.6.8. Strange enough. Commented Dec 1, 2014 at 1:01
  • Ahh, yes, pre-Lion there is no tmutil. You may have to do some Googling to find the answer on how to achieve this, which the author of the linked article describes as "very techie".
    – douggro
    Commented Dec 1, 2014 at 3:01

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