Corruption on Mac OS X hard drive would be the last thing a user would like to face. Mac drive corruption may show up in any one of the three forms: damage to the Mac OS X startup disk directory, corrupt permissions on system files and folders, and corrupt system, application and user-specific cache files. Some of the likely culprits responsible for corruption are application crashes, hard restarts, failing hard drives, bad sectors on the startup disk, third-party application installers, and the like.
Any instance of Mac drive corruption is characterized by the risk of data loss. However, the severity of the risk entirely depends on the cause of the issue. Directory corruption may or may not result in data loss. If you have corruption in the files, then you are doomed to face loss of information. Only a few types of directory corruption (such as overlapped files or extents) lead to file corruption and inevitable data loss. A good backup and recovery solution is the best bet to recover from such instances of data loss on Mac. If you do not have one, then you should approach inbuilt Mac utilities to fix OS X drive corruption.
Apple provides an indispensable tool ‘Disk Utility’ that allows you to work with the OS X drive. With the help of Disk Utility, you can verify and repair your startup disk and other secondary volumes. Verifying a Mac OS X startup volume while booted from the same is known as ‘Live Verification’. In case errors are found with the volume, you need to boot from your Mac OS X Install DVD to make the repairs. You may receive many alerts during the process stating ‘Incorrect size for file temp’. You can safely ignore them. Mentioned below is the procedure to fix directory corruption on Mac OS X startup disk using Disk Utility:
If you fail to fix Mac OS X drive corruption, take help of professional data recovery Mac tools. These competent utilities comprehensively scan your hard drive to recover every piece of lost, deleted, or inaccessible information. Furthermore, they support the latest Mac OS X 10.8 ‘Mountain Lion’.