Disk Utility 12.x: Repair disk permissions
If you see a message that your permissions are set improperly, you may be able to correct the disk’s permissions.
- Choose Apple menu > Software Update to make sure you have the latest version of Mac OS X.
Software updates sometimes change a file’s permissions to improve security, so updating your software can solve some permissions problems.
- Open Disk Utility, in the Utilities folder in Launchpad.
- Select the disk you want to check.
You can verify or repair permissions only on a disk with Mac OS X v10.7 Lion installed.
- Click First Aid.
- Do one of the following:
Click Verify Disk Permissions to test permissions.
Click Repair Disk Permissions to test and repair permissions.
Disk Utility repairs the permissions for files installed by the Mac OS X Installer, Software Update, or an Apple software installer. It doesn’t repair permissions for your documents, your home folder, or third-party applications.