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I have an older Mac mini with 3 partitions: one running 10.5, 10.6, and 10.7. I'd like to back these up via Time Machine, however, I'd like them to each be separate backups. Whenever I try to back up one partition to the TM drive (with all other partitions excluded), it works fine. When I boot into a different partition and back up, it uses that same backup, adding the other partition to the mix.

How can I make them each use their own unique backups?

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When you set a TM backup you specify which drive and partition to backup to. If you have an empty drive you can give it 3 partitions (or more) using disk utilities. Then when you back up your 3 partitions you can back each one up to a separate partition on the other drive. The real problem is that having three time-machine backups means your machine will almost always be backing up something. Since it backs up hourly I'd kick them off 15 minutes apart.

There are also extensions and apps that let you change the hourly backups to daily, or weekly. You could then back-up 10.5 on Wednesdays, 10.6 on Thursday, and 10.7 on fridays. Or back them all up once a day 7 days a week and separated the backups by 8 hours.

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  • why the downvote, it a legit answer.
    – Natsfan
    Aug 8 '20 at 19:05
  • I wasn't the downvoter, but this isn't really the answer I'm looking for. I'd like to avoid using 3 separate partitions for the backup. I'm looking for a way to "un-inherit" backups.
    – At0mic
    Aug 11 '20 at 2:44
  • ok. Sorry I couldn't help you.
    – Natsfan
    Aug 11 '20 at 2:45

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