What is 'Other' and 'Purgeable' in About This Mac?

The Storage tab in About This Mac shows about how much storage space certain files are using on each of your connected drives.

To see a summary of how the storage space on your Mac is being used, choose About This Mac from the Apple menu (), then click the Storage tab. Each segment of the bar is an estimate of the storage space used by a category of files. Move your pointer over each segment for more detail.

  • In OS X El Capitan or earlier, “Other” files are those that your Mac doesn't recognize as belonging to any other category. These include files within disk images or archives, data stored by apps such as Contacts or Calendar, and app plug-ins or extensions. When your Mac is in Safe Mode, all files are categorized as Other.
  • In macOS Sierra, “Purgeable” content appears when you've turned on Optimize Mac Storage. It's storage space that your Mac can automatically make available when storage space is needed. Files marked as purgeable can always be downloaded again on demand.
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