I have an external drive hooked up to my Mac, and I'm trying to determine things like, e.g., is this HFS or FAT, is it 32-bit or 64-bit, etc. It seems like there should be some trivial command that gives me this info, but I can't seem to find one. Ideas?


diskutil(8) with the info predicate will give you information about a disk or partition.

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  • link is dead mate – Theo Jun 26 '18 at 9:22
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    diskutil list also shows all available drives and volumes with their type (file-system). – Robert Nov 27 '18 at 10:04
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    diskutil info -all – Shayan Oct 20 '19 at 22:48

Highlight the volume in finder (note, that it must be the root of the volume), and hit cmd + i. The info dialog that appears shows you the filesystem type against the Format label.

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Running mount in Terminal.app also works and has way less noise when compared to diskutil info -all.

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  • it works, but output is a bit ugly though. – pdwalker Oct 28 '19 at 6:56
  • mount | column -t makes it less visually dense. – erik.weathers Nov 20 '19 at 20:15

Unless you're wedded to doing it from the command line, use Disk Utility and it's "Info" button.

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The 'mount' will show the filesystem type.

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