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Repair Disk Permissions
Most users of Mac OS X have not intentionally modified privileges and simply need a utility to reset system privileges to their correct default values. Repairing Disk Permissions is included in Disk Utility which can help reset all permissions on that can interfere with your installation, patching or game play.
Navigate to /Applications/Utilities/ and open Disk Utility
Select the hard drive the game is installed on
Select the First Aid option
Click on the Repair Disk Permissions button
Repair Disk
Repair Disk verifies and, if problems are found, corrects issues with the directory on a disk or volume. This includes bad sectors and corrupted sections on a disk. There are two methods on repairing a disk. Start with a Safe Boot prior to using Disk Utility. Kilde:
http://eu.battle.net[...]
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