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Sudo defaults delete /Library/Preferences/ MaxSize Limit Time Machine backup size in all versions of macOS If you want to revert to the default value (no limit), run this command: And that’s it! From now on, Time Machine on that Mac will automatically delete old backups to make sure it uses no more than 300GB. You’ll be likely prompted to enter your account’s password, so do that and press Enter again. Sudo defaults write /Library/Preferences/ MaxSize 307200
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Note that you need to log in with an administrator account. This trick is easy to implement and for sure works on macOS 10.12 (Sierra) and older versions. Limit Time Machine backup size in macOS 10.12 and earlier The more storage space, the more versions of backups you’ll get, which means the further you can go back in time. So, for example, if your MacBook has 128GB of internal storage, 300GB of backup space is generous. Generally, you want to use 150% or more of your Mac’s internal drive capacity.
PARTITION SEAGATE EXTERNAL HARD DRIVE TIME MACHINE HOW TO
(If you don’t know how, check out this post, which also gives you some other handy Mac skills, including how to run Terminal, which you’ll need to use in this post.)Īfter that, find out the amount of storage you need for the backups. Determine the OS version and suitable backup limitīefore you can fix Time Machine’s storage, you first need to determine what version of macOS you’re running.
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Creating a separate partition on your backup drive is the best way to control the amount of storage Time Machine will use.