#Run disk aid from recovery for mac os x
#Run disk aid from recovery mac os x

Severe directory corruption can often be repaired by third-party disk utilities, such as Alsoft® DiskWarrior® and Micromat® TechTool® Pro.īefore attempting to use a third-party utility to repair a disk or volume, assure that you have the latest version of the utility that is compatible with the version of Mac OS X you are using.įor additional information about the Repair Disk and Verify Disk functions of Disk Utility, consult Disk Utility Help.

While Repair Disk can correct a variety of directory problems, it is generally incapable of repairing severe directory corruption. If Verify Disk finds errors on your startup disk, you must repair the disk as noted in point 1.

#Run disk aid from recovery for mac os x

If you are running Mac OS X 10.4.3 or later and your startup disk is in Mac OS X Extended (Journaled) format the default format for Mac OS X 10.3 Panther® and later you can use Verify Disk to verify the directory of your startup disk while your Mac is started up from such.See Steps 1-2 of the Procedure specified in our 'Resolving Disk, Permission, and Cache Corruption' FAQ for step-by-step instructions on repairing your startup disk using your Mac OS X Install disc. To repair your startup disk, you must startup from your Mac OS X Install disc or another drive on which Mac OS X is installed. You cannot use Repair Disk to repair your Mac OS X startup disk for example, Macintosh HD while your Mac is started up (booted) from such.Keep in mind the following key points about Repair Disk: All hard disks have one or more volumes or partitions. A volume, also known as a partition, is section of a physical hard disk which, from the perspective of the operating system, works like a separate disk. The directory is analogous to a combined address book and road map to where data is stored on a disk or volume. Repair Disk verifies and, if problems are found, corrects issues with the directory on a disk or volume. Verify or Repair? The Repair functions of Disk Utilityĭisk Utility, located in the Macintosh HD > Applications > Utilities folder, can perform two types of repairs via the following choices in the First Aid tab:.

Why are repairs needed? When should I use these functions?.It is a subset of the more comprehensive information on these topics from our book, Troubleshooting Mac OS X. This FAQ provides a brief overview of the Repair Disk and Repair Disk Permissions functions of Disk Utility in Mac® OS X. The Repair functions of Disk Utility: what's it all about?