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Archive for April 7, 2018

Reclaiming drive space by thinning Apple File System snapshot backups

April 7, 2018 16 comments

As part of a recent clean-up of my Apple File System-formatted (APFS) boot drive, I deleted a number of files. However, I noticed that deleting files did not free up nearly as much space as I thought it should. When I investigated, I noticed that my boot drive had a number of Time Machine snapshots stored on it.

Screen Shot 2018 04 07 at 2 04 39 PM

A quick way to reclaim space from a particular snapshot immediately would be to delete the snapshot using the tmutil command line tool, using the command shown below:

tmutil deletelocalsnapshots snapshot-name-here

However, I didn’t want to delete backups if I could avoid it since I might need something stored in one of them. After some research, I was able to find a tmutil command that did what I needed. For more details, please see below the jump:

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