OS X Lion: If you don’t have the correct permissions to open a file or folder
If you don’t have permission to open open a file or folder, you may be able to change the permission settings (”privileges”).
- Select the item and choose File > Get Info.
- Click the triangle next to Sharing & Permissions to expand the section.
- Open the pop-up menu next to your user name to see the permissions settings. If you are not logged in as an administrator, you may need to click the lock icon and type an administrator name and password. If you’re the only user of your computer, you are the administrator.
If the setting for your account is No Access, you can’t open the item.
If you can’t change the permissions, contact an administrator of your computer or the owner of the file or folder.
If necessary, you can use Disk Utility to repair permissions on your disk.