APFS encryption provides users file system level protection to any data you stored in that volume/drive. Every now and then however, users will find the APFS (encrypted) volume not mountable on their Macs. In this article, we will discuss why APFS (encrypted) volume not mounted, and how to fix it to mount APFS (encrypted) volume correctly without losing data.
Why APFS (encrypted) volume not mounted?
"APFS (encrypted) volume not mounted" error could be due to damaged or corrupted file system, unsafe ejection, volume header corruption, unexpected power outage, etc. Whatever the reason is, you will have no access to the data on the unmounted APFS (encrypted) volumes.
How to fix APFS (encrypted) volume not mounted error without losing data?
Solution 1: Fix APFS (encrypted) volume not mounted error with Disk Utility.
Disk Utility is designed to verify and repair minor errors of disks on Mac, such as unmountable, unreadable, inaccessible volumes or drives. So, to get rid of APFS (encrypted) volume not mounted error, Disk Utility should be your first attempt.
1. Go to Applications > Utilities > Disk Utility.
2. Select the unmountable APFS (encrypted) volume from the sidebar.
3. Click on First Aid on the top. Wait until the process finished.
But sometimes Disk Utility can't mount APFS volume, or Disk Utility can't repair APFS partition. It might be resulted from the invalid fsroot tree. In this case, go ahead to Solution 2 to recover lost data from unmountable APFS (encrypted) volume and reformat it.
Solution 2: Fix APFS (encrypted) volume not mounted error by reformatting.
Before reformatting the unmountable APFS (encrypted) volume, you should be sure you have a backup of the files on that volume. If unfortunately you don't, you need to recover lost data from the APFS (encrypted) volume with APFS encrypted data recovery software, such as iBoysoft Mac Data Recovery
iBoysoft Mac Data Recovery is prefessional data recovery software for Mac that supports APFS and encrypted APFS file systems. It's able to recover lost data from corrupted APFS partition, recover lost data after APFS encryption paused, froze, interrupted, and recover lost data from encrypted APFS external hard drives, USB drives, SD cards, memory cards and other storage devices on macOS 10.15/10.14/10.1310.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7.
Step 1: Recover lost data from not mounted APFS (encrypted) volume with iBoysoft Mac Data Recovery.
1. Launch iBoysoft Mac Data Recovery on Mac and click "Find Lost APFS Partition" on the top right corner. Then you will see all connected hard drives.
2. Select the drive which contains your unmountable APFS (encrypted) volume and click "Next".
3. Choose the unmountable APFS (encrypted) volume where you have lost data and click "Next".
4. Enter the right password and then click "OK" to start searching for lost files on the volume.
4. Preview the listed searching results, choose files you need, and then click "Recover" to get lost files back.
5. Go through to ensure you have got all lost files back.
Step 2: Fix "APFS (encrypted) volume not mounted" error by reformatting.
After successfully recovering lost data from the unmounted APFS (encrypted) volume, let's now fix the unmountable APFS (encrypted) volume by reformatting.
1. Go to Disk Utility.
2. Select the not mounted APFS (encrypted) volume from the left sidebar.
3. Click the Erase button on the top of the Disk Utility window.
4. Complete the required information (name, format, scheme), then click Erase.
Now, you can mount the APFS (encrypted) volume correctly and read, write to it on your Mac.
If you're facing APFS volume not mounted on macOS High Sierra/Mojave/Catalina or APFS drive can't be mounted errors, you can also try the solutions above.