How do I repair disc permission on a Mac?

May 26, 2016 Kelly Basara

1. Log in to your computer with the administrative account. Open the hard drive, go into the Applications folder and then open the Utilities folder. Now launch the Disc Utility application.

2. Select your main hard drive. You'll probably see two options--one is the manufacturer's name of the disc and the other name is what you've called it. Choose the name of your hard drive.
3. Click on Verify Disc Permissions and the computer will perform a diagnostic test. After a few minutes, the problems with disk permissions will be reported in the Disc Utility window. Click on Repair Disc Permissions to fix them.
4. Insert your Mac OS X installation disk and restart your computer. Hold down the C key on your keyboard to boot from the disk rather than your computer's hard drive. Cancel the OS installation and open Disc Utility.
5. Click on Verify to have Disc Utility check your computer's hardware. Notice that this option is only available when the program is run from the CD. You can only test the hardware of a computer that isn't running the program locally.
6. Use Disc Utility to try and repair any hardware errors that it detects. Usually fixing the permissions will be enough to maintain your computer. If you still experience frequent lockups and crashes, then you should try repairing it with this method.
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