January 26, 2018 | 5 min read
How to Repair Disk with Mac Disk Utility
How do you know if your disk needs repair?
If you’re experiencing problems with your Mac, you can use Disk Utility, the macOS built-in diagnostic and recovery tool. Run it to repair your startup drive when you notice one of these hard drive failure warning signs:
Unexpected application crashes and disk errors
Malfunction of your external drive, USB stick, or mouse
Corrupted permissions and access to specific files
Improper Mac startup
Strange humming, scratching, or clicking noises coming from your hard drive
Step-by-step hard drive recovery using Disk Utility
If you’ve ever faced any of the problems mentioned above, then it’s time to give your hard drive a tune-up. With the help of Disk Utility, you might be able to save a corrupted hard drive. But if your drive is totally failing, the best option would be to back up all your data and get a new disk.
To start recovering your hard drive with Disk Utility, restart your Mac. Just click the Apple logo in the top left corner of your screen and select Restart.
All the magic begins once you hear the startup chime. Press and hold down Command + R keys until you see the Apple logo.
Next, select the Disk Utility tool in the new window and click Continue. Select the disk that needs to be repaired from the sidebar and click the First Aid tab. Now just wait until the scan is finished and results are displayed on the screen.
Further steps depend on whether your startup disk is still failing or has been successfully repaired.
Disk Utility shows your startup drive is about to fail
In a worst-case scenario, the Disk Utility scan will let you know that your current hard drive is failing. In this case, we recommend backing up all your important files. Next, take your Mac to an authorized repair service or the local Apple Store as soon as possible.
Disk Utility suggests running diagnostics
If Disk Utility reports your hard drive was successfully repaired and there’s no sign of physical damage, consider yourself lucky. Unfortunately, that isn’t always the case. Sometimes repairing disk utility doesn’t go smoothly and Disk Utility tells you about a certain task failure. In this case, you can try to repair the same disk once more. If it still doesn’t help, back up important data and try to reformat your hard drive, reinstall macOS, and restore your data when you’re up and running.
Note: Only advanced macOS users should try reformatting and reinstalling macOS. If you don’t consider yourself tech-savvy enough, you’d better take your Mac to the local Apple Store or an authorized service provider for further assistance.
We hope your hard drive will serve you well and you’ll never face anything described in this post. And just in case you do, you know how to fix it.
Found this useful? Stay tuned for another helpful blog update.