Kit Guide: Using the OS X Disk Utility

If you're experiencing problems with your Apple computer, such as apps unexpectedly closing, corrupt files, external devices not working properly, or your computer not starting up, you might be able to fix these issues using 'Disk Utility'.

Checking and fixing file and directory permissions

squiggle
1.

Go to Applications > Utilities > Disk Utility.

2.

Click the drive on the left. This is usually labeled 'Macintosh HD'.

3.

Click Verify Disk Permissions.

4.

When it's done, click Repair Disk Permissions at the bottom.

Using Disk Utility for diagnostics and repair

squiggle
1.

To check the disk for errors, go to Applications > Utilities > Disk Utility.

2.

Click Verify Disk.

3.

If you see any errors (shown in red), you'll first need to shut down your Mac.

4.

Restart the computer while holding down the CMD and R keys.

5.

Click Disk Utility from the Utilities menu.

6.

Choose Repair Disk.

Accessing Disk Utility if the computer won't start up

squiggle
1.

Hold down the CMD and R keys, then press the power button.

2.

When the recovery console opens, click Disk Utility.

3.

Choose Repair Disk.

Hopefully, this is all the help you need. If the problem still isn’t fixed, though, you can get in touch with our Team Knowhow experts here.

Need some more help?

My default image

Expert Support

If you’ve got an issue with any of your kit, our experts are on-call to help 24/7 - in-store, at home, or over the phone.

More info
My default image

Expert Repair

When your kit’s fully broken, you need it fixed fast. Our accredited experts will get you back up and running in no time.

More info