APFS volume not mounted in High Sierra - how to fix and recover data?
Using High Sierra is not always pleasant, especially when we encounter problems. Some Mac users complained that their APFS volume can not mounted in High Sierra. When an APFS volume is not mounted, it is impossible to find it in Finder, and sometimes even can't find it in Disk Utility.
'APFS volume not mounted in High Sierra' error can be caused by damaged or corrupted file system, unsafe ejection, volume header corruption, unexpected power outage, etc. But no matter what causes this error, the most important thing we should do is to find method to fix it.
Easy method to fix 'APFS volume not mounted in High Sierra' error
Before fixing this error, we should firstly recover data from not mounted APFS volume to avoid losing files. It should be noted that the faster we perform data recovery from the unmountable APFS volume, the more likely we can get lost files back.
Step 1: Recover data from not mounted APFS volume with iBoysoft Mac Data Recovery
iBoysoft Mac Data Recovery is a free & professional Mac data recovery software that can recover data from not mounted APFS volume, 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 APFS data recovery, 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 not mounted APFS volume with iBoysoft Mac Data Recovery
1. Launch iBoysoft Mac Data Recovery.
2. Select the not mounted APFS volume and click "Next" to scan lost data.
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 data back.
Step 2: Fix 'APFS volume not mounted in High Sierra' error by reformatting
After successfully recovering lost files, we can fix 'APFS volume not mounted in High Sierra' error by reformatting the APFS volume.
1. Launch Disk Utility from Utilities.
2. Select the not mounted APFS volume 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.
Still have questions?