Apple Repair Privileges for Mac

From Apple:

The Repair Privileges utility restores the privileges of Mac OS X system files and Apple-installed software to their default configuration. All previous modifications to the privileges of these files and directories will be lost. While this utility does not change permissions of third-party software (if third-party software has changed Apple-set permissions), that software may not work as expected after using the utility. Use the Repair Privileges utility to resolve any of the following issues:

• "An error of type -192" alert message in Disk Copy when disk images fail to become available.
• "An error of type -108" alert message in Print Center when spooling print jobs.
• "You are running Classic without superuser (root) Privileges" alert message when trying to start up Classic and the System Folder is blessed.
• An Admin user cannot drag files to a folder to which they should have write access, for example, the Applications folder.
• Files are unexpectedly locked and cannot be unlocked in the Finder.

  What's new in this version:

  • No longer checks files and directories in /private/var/run/. This change eliminates any repeating messages in the Log that permissions were corrected for these files.
  • Fixes an issue where running Repair Privileges 1.0 with iTunes 3.0 installed would prevent iTunes 3.0 and the iTunes Helper from launching. If you did run Repair Privileges 1.0 with iTunes 3.0 installed, use Repair Privileges 1.1 to fix iTunes and iTunes Helper.
  • Enabled the About Repair Privileges dialog.