How to fix 'APFS drive can't be mounted and Disk Utility doesn't work' error?

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

After upgrading from macOS Sierra to macOS High Sierra on my MacBook Air, I also converted my external hard drive to APFS. But yesterday, my external hard drive can no longer be mounted on Mac and even Disk Utility can't mount it. Is there any way to access files on that drive or fix this error?

'APFS drive won't mount' is one of the most common errors we may meet. When the situation is not very serious, we can use Disk Utility to mount unmountable APFS drive. However, when the APFS drive has serious errors, it can't be mounted even with Disk Utility. This error is usually caused by corrupted or damaged file system.

Here is an easy method to fix 'APFS drive can't be mounted and Disk Utility doesn't work' error. But before fixing, we should stop using the unmountable drive to avoid any further damage to the drive as well as files inside.

Two steps to fix 'APFS drive can't be mounted and Disk Utility doesn't work' error

To avoid data loss, the safest way is to recover data from unmountable APFS drive with professional APFS data recovery software at the first step, and then try to fix 'APFS drive can't be mounted and Disk Utility doesn't work' error by reformatting.

Step 1: Recover data from unmountable APFS drive with iBoysoft Mac Data Recovery

iBoysoft Mac Data Recovery is a professional Mac data recovery software that can recover data from APFS drive that even can't be mounted with Disk Utility, recover deleted/lost files from APFS drive, recover data from formatted APFS drive, recover data from corrupted APFS drive, recover data from unreadable APFS hard drive, recover data from encrypted APFS drive, recover deleted/lost APFS partition, etc.

Aside from above, iBoysoft Mac Data Recovery can also recover data from drives of other formats (FAT32, exFAT, HFS+), recover data from formatted, unmountable, unreadable, corrupted hard drive, external hard drive, USB flash drive, memory card, pen drive, etc. on macOS Mojave 10.14/High Sierra 10.13/10.12 and 10.11/10.10/10.9/10.8/10.7.

Tutorial to recover data from unmountable APFS drive with iBoysoft Mac Data Recovery

1. Launch iBoysoft Mac Data Recovery.

Recover data from unmountable APFS drive

2. Select the unmountable APFS drive and click "Next" to scan lost files on the drive.

3. Preview the searching results, choose files we need, and click "Recover" to get them back.

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

Step 2: Fix 'APFS drive can't be mounted and Disk Utility doesn't work' error by reformatting

After successfully restored all lost data, we can try to fix 'APFS drive can't be mounted and Disk Utility doesn't work' error by reformatting the APFS drive as the steps below without worrying about losing files.

1: Launch Disk Utility.

2: Click the unmountable APFS drive on the left part of the window.

3: Click the Erase on the top of the Disk Utility window.

4: Complete the related information (name, format, scheme), then click Erase.

(If the drive still can't be mounted with Disk Utility, we can turn to a local technician for help.)

Still have questions?