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I have a bunch of Time Machine archives for old computers I no longer have. I want to encrypt these archives. Can that be done using a different computer than the one that was backed up?

I have looked that the tmutil man-page and found a couple of interesting options there:

inheritbackup - seems to make it possible to use the TM-destination for machine A for machine B. However, there is a caveat in the instructions:

Inheriting is typically only one step in the process of configuring a backup for use by a machine. You may also need to use setdestination, associatedisk, or both, depending on the situation.

Since this is backup data I don't want to lose or corrupt I am a bit hesitant to experiment (I have copies but if I perform a couple of operations and everything looks fine and I therefore delete my copies just to, a year from now, realise that I broke something I won't be too happy...). Would be nice with a HOWTO or step-by-step guide, if possible.

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  • You may want to go with a method that is not dependent on any particular Mac. EG encrypt it with a password that does not have to be associated with a particular Mac, like (I believe) inheritbackup does. Commented Aug 13, 2020 at 22:52
  • Please don't double post the same question - instead, edit the original.
    – Allan
    Commented Aug 14, 2020 at 0:34

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