How to fix 'file system verify or repair failed' error on macOS High Sierra?

Posted by Juno to Mac Data Recovery on February 24th, 2018

"macOS High Sierra could not be installed on your computer. File system verify or repair failed" is an error that we may encounter when want to upgrade to a new macOS. This message indicates that there are some errors on our file system and make the new macOS can't be successfully installed.

file system verify or repair failed on macOS High Sierra

Usually when encountering this message, the Mac can't be used as usual and files on it can't be accessed. No need to worry any more. This passage will introduce a reliable method to fix 'file system verify or repair failed' error.

Reliable method to fix 'file system verify or repair failed' error on macOS High Sierra

After getting the error message, we'd better stop using the drive to avoid any further physical or logical damage to the drive as well as files on it. For the sake of files on the drive, we should firstly perform data recovery from the drive, reformat it and then reinstall macOS.

Step 1: Recover data from 'file system verify or repair failed' drive with iBoysoft Mac Data Recovery

iBoysoft Mac Data Recovery is a free & professional Mac data recovery software that can recover data from drive that has 'file system verify or repair failed' error, recover files even emptied from Mac Trash, recover data from formatted drive, recover data from unmountable drive, recover data from unreadable drive, recover data from corrupted drive, recover deleted/lost partition, etc. on macOS 10.14‎/High Sierra 10.13/10.12 and 10.11/10.10/10.9/10.8/10.7.

Tutorial to recover data from 'file system verify or repair failed' drive with iBoysoft Mac Data Recovery

1. Launch iBoysoft Mac Data Recovery.

2. Select the drive that has 'file system verify or repair failed' error, then click "Next" to start scanning.

Recover data from drive that has 'file system verify or repair failed' error

3. Preview listed scanning results, select files we need, and click "Recover" to restore files.

4. Have a check to ensure we have got all lost files back.

Step 2: Fix 'file system verify or repair failed' error by reformatting

1. Launch Disk Utility.

2. Select the drive that has 'file system verify or repair failed' error.

3. Choose Erase, complete related information (name, format, scheme), and then click Erase to reformat the drive.

Step 3: Reinstall a new macOS

After reformatting the drive, we can try to reinstall new macOS.

Still have questions?