

The startup disk is shown at the top of the list other partitions are shown below. Use this window to check how much hard drive space is available on your Mac. From the Apple menu, select About This Mac.(For instructions, see the related articles below.) Checking Available Hard Drive Space on Mac OS 10.7 or Later If your Mac is running OS 10.7 or later, here's how to check to the available hard drive space on your Mac:

If you are running out of available space, it's time to delete some files or install a new hard drive. Note: Your startup disk should have some free space available - ideally 10% of the disk should be free. Plus, if your Mac is running Mac OS 10.7 or later, the interface shows which types of files are taking up the most space, a feature that could help you track down space-hogging files and applications. Ever wonder how much free space is available on your Mac's hard disk or partitions? It's easy to check in OS X.
