How to repair Disc permissions in Mac OS X?

How to repair Disc permissions in Mac OS X?

Disk Permissions –

Repair Disc permissions allow the system to control what users have access to file. Each and every folder that is present on Mac’s disk has an associated set of permissions. These determine who can read/write or execute them. Due to this, Mac OS X keeps a master list of all permissions. In fact, the process of installing and uninstalling apps on Mac can over time result in broken permissions.  The operating system can run files on the disk and compare their permissions with the original master list of permissions. In case of any failure, permissions can be reversed back to their original state. Repairing disk permissions are the fastest way of resetting system to default.

Why there is a need to repair Disc permissions?

  1. If your Mac’s performance has degraded.
  2. some essential data is missing.
  3. you are experiencing degraded system performance after a power cut.
  4. Repairing disk permissions is also a part of regular system maintenance task.

You can repair Disc Permissions by the processes that are outlined below –

Verify Disk Permissions with Disk Utility

First, open Disk Utility on your Mac. To open Disk Utility, select  Go> Utilities. You can also find in the Applications folder. From the list of all detected volumes and disk, select the disk that you want to verify permissions. Move to the left pane and then click on the disclosure triangle. It will display the names of volumes and partitions. Next, tap on First Aid and then hit on “Verify Disk Permissions” button. Once the repairing gets complete, Disk Utility will display a “Permission Verification Complete” message.

Repair Disk Permissions with Disk Utility

Open Disk Utility on your Mac and then choose your disk from the left-hand column. After this, click on First Aid > Repair Disk Permission button. When the repair process is finished, Disk Utility will display a “Permission repair complete” message on the Mac OS X screen.

Repair Disk Permissions from Command Line –

Navigate to utility folder and open Terminal.  You can also use Spotlight search to locate Terminal.
Once Terminal is open, you have to type following command in Terminal’s window.
“sudo diskutil repair permissions/”
Now the repair process will start with default startup volume.  You will see the following message on Mac OS X’s screen.
“Started verify/repair permissions on diskos2 Macintosh HD”
If you find tons of incorrect permissions on your disk as you can safely ignore them. For instance, if you see “ACL found but not expected” error message then you can ignore without thinking anything. After performing above system operations, you should reboot your Mac and see if performance improves or not.

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