

Therefore, first open Disk Utility and check your hard drive for errors.

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The space used on a hard drive comes from the format's database files, and if these are damaged then the free space on the drive can be incorrectly reported. However, first be sure the drive's formatting is not showing any errors.

If the Information window shows your drive only has a few gigabytes of space left, then your drive is nearly full. To do this, add your hard drive to the Spotlight Privacy list in the Spotlight system preferences, and then remove it. Note that this graphical representation is derived from a Spotlight index of your drive, so if the total space used is significantly different than that reported in the information window, it suggests your Spotlight index may need to be rebuilt. Compare the usage reported here to that in the information window you opened earlier. , and then click "More Info." In the window that appears, click the "Storage" tab in the toolbar, and you should see a graphical representation of the space used on your drive. Next, go to the Apple menu, choose About This Mac Note that these statistics are raw readings of your drive's usage, and should be accurate. In here, check the "Capacity," "Available," and "Used" statistics, to see how much space is used. With your boot drive selected, press Command-i to get information on it, and then expand the "General" section in the information window. You can then click your boot drive, which is by default named Macintosh HD. To do this, open a new Finder window and choose your hard drive on the Finder sidebar, or optionally in any Finder window press the Command key and then tap the up arrow until the displayed contents stops changing, and you will be left with a window showing your drives, optical discs, and the Network icon. If you encounter such a warning, then first check how much space on your hard drive is free. If this happens, you might also sense the system running a little slower in general, which can be frustrating to deal with. When using your Mac, you may regularly download, install, and create content, but then run into a warning that you need more free space on your hard drive.
