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Error while checking the startup disk

If OnyX detects an error while verifying the structure of the disk, be sure to repair it as soon as possible.

To repair a disk:

1

Quit OnyX.

2

Restart the computer while holding down Command-R until the Apple logo appears.

3

In the OS X Utilities window, choose Disk Utility, and click the Continue button.

4

In the left column, select your startup disk.

5

In the First Aid tab located at right, click the Repair Disk button and wait.

6

Then restart normally...

The errors are often not serious, and they are usually corrected by Disk Utility. Nevertheless, more serious errors can require that you use a third-party application (Drive Genius, DiskWarrior, TechTool Pro, and so on).

Related Topics

Verify the startup volume