However, it can sometimes happen that you see numbers in this window that are obviously incorrect, and About This Mac may even report 0KB used for a file type when you know far more than this is on your system.įor example, on my Mac I have tens of gigabytes of audio files, movies, photos, and applications installed however, the About This Mac window reports that the system contains 0KB for each of these categories. The storage view shows your hard drive and includes a small diagram that breaks down the amount of space used by audio files, movies, photos, applications, backups, and then any other file type.

When this error occurs, you may see one or more categories show incorrect size calculations. This tool can be used to generate a detailed system report, but by default will show a brief summary window that includes a breakdown of storage usage. If you are running OS X Lion or Mountain Lion and need to see some quick information about your Mac's hardware, you can do so by selecting 'About This Mac' from the Apple menu, and then clicking the 'More Information' button to launch Apple's System Information tool.

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