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2.4. How to check your Mac's free hard drive space from the Finder

The Finder gives you at least a couple ways to see how much free disk space you have. The first method is to check the Get Info window for your hard drive.

First, you need to find your hard drive in the Finder and select it. If it appears in the Finder window sidebar  or on the Desktop (it doesn't by default—go to Finder > Preferences... to change that), click your hard drive's icon in either of those spots. If your hard drive icon doesn't appear there, go to Go > Computer, then click the hard drive icon. Pop open the File menu, and select Get Info, and note the drive's capacity, available space, and used space.