Changing File Permissions To change the file permissions for files, folders or drives, first select the item in Finder and then open the Get Info window.

Want to limit access to your system? Here's how to change file permissions on Mac and restrict their access to different users on your computer.

How to Batch Change File Permissions in Mac OS X. Batch changing your file permissions can save a great deal of time, since you don't have to individually select files to determine who can access ...

Repair permissions only works on Apple-set permissions of system files. If a rogue app that you installed is what is causing your Mac to go all squirrely, repairing permissions won't do anything.