Desmond Leung updated January 6, 2015 at 9:50 AM
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Boot up from your Mac OS X Installation/Restore Disc. You can do this by holding down the C button when your computer boots up after loading the DVD.
- You will be brought to the Language Screen. Click forward to bypass this.
- At the top of the screen, choose Utilities > Disk Utility.
- Choose your hard drive from the left side column. Then choose the First Aid tab and choose Repair Disk.
- If your hard drive is fine, it should say "Hard Drive is OK".
If there are any errors, do another "Repair Disk". If errors still exist, contact the Help Desk
Method 2) Using OS X Recovery to repair a start-up disk
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- On a piece of paper, write down the commands
Code Block /sbin/fsck -fy
a. exit
- Restart your machine and hold down the ⌘-S ("Command" and "S") key through the startup chime. After ~30 seconds a black screen will appear with scrolling text.
- When the :/ root# prompt appears, type /sbin/fsck -fy. and press return. This command will start a disk repair.
- If no errors were found, the final message will display:
** The volume (name_of_hard_drive) appears to be OK
If the disk was successfully repaired, this message will display:
** The volume (name_of_hard_drive) was repaired successfully.
If there are any errors, do another "Repair Disk". If errors still exist, contact the Help Desk.
- Type "exit" and press return to resume booting to Mac OS X.
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