A few weeks ago, I converted all of my three external hard drives to APFS formatted encrypted volumes on macOS (10.13.4). Everything went well, except for one drive. When plugged, this drive kept asking for the password, even I inputted correct password. I have run disk util command in Terminal but get the result as below:
Error starting background decryption of apfs volume: apfs volume decryption failed to begin (-69595)
I don't want to lose my data and I retried several times but no luck. Any suggestion how can I get all data back or decrypt the APFS volume?
APFS has replaced HFS+ as the default file system for macOS High Sierra, Mojave and Catalina,Big Sur 11. Comparing to previous HFS+, one of main features of APFS is file encryption support. Before, Apple's encryption scheme is called FileVault, which is whole disk encryption. That is to say, once you encrypt a hard drive with FileVault, it is on or off for the whole volume. APFS not only supports full disk encryption but also encrypts individual files and metadata with multiple keys.
Even though APFS provides additional security for your most sensitive data, sometimes APFS volume decryption failed to begin or APFS volume decryption interrupted, stuck, froze, paused, etc. In this post, we will talk about why APFS volume decryption failed to begin and how to recover lost data after APFS volume decryption failed.
How to recover lost data after APFS volume decryption failed?
APFS volume decryption failed to begin? Unable to access all data on the encrypted APFS volume? If you have important files on the drive but didn't back up, the first thing is to get lost data back. iBoysoft Data Recovery for Mac can help you recover lost data after APFS volume decryption failed.
iBoysoft Data Recovery for Mac is the best APFS data recovery software that offers you different APFS data recovery solutions. encrypted APFS external hard drive data recovery, formatted APFS encrypted drive data recovery, corrupted APFS volume data recovery, unmountable APFS drive data recovery, etc.
Tutorial to recover lost data after APFS volume decryption failed:
Step 1: Launch iBoysoft Data Recovery for Mac on Mac and click "Find Lost APFS Partition" on the top right corner. Then you will see all connected hard drives.
Step 2: Select the drive which contains your APFS encrypted volume and click "Next". The program will list all APFS volumes on the selected drive.
Step 3: Choose the APFS volume that failed to decrypt and then click "Next"
Step 4: Enter the password and click "OK" to scan for all lost files on the volume.
Step 5: Preview the list results, choose what you want to get back, then click "Recover".
Step 6: Go through to make sure you have all the lost files back.
Besides APFS data recovery, iBoysoft Data Recovery for Mac also support data from HFS+, HFS, FAT32, exFAT drives on macOS 10.14/10.13/10.12 and macOS 10.11/10.10/10.9/10.8/10.7.
APFS volume decryption failed to begin, how to fix?
Since Mac fails to decrypt your APFS encrypted volume, reformatting the APFS volume is the only way to fix APFS volume decryption failure. But please make sure you have backed up or restored important files with iBoysoft Data Recovery for Mac before.
Step 1: Launch Disk Utility from Utilities.
Step 2: Click the icon of the APFS drive that failed to decrypt on the left part of the window.
Step 3: Click the Erase function on the top of the Disk Utility window.
Step 4: Complete the related information (name, format, scheme), then click Erase button.
Why APFS volume decryption failed to begin?
APFS volume decryption failure is caused by corrupted file system and damaged partition table, Mac cannot get the volume information or recognize the internal memory then the APFS volume decryption failed to begin. Usually, these two reasons result from virus infection, sudden power outage, improper operation, etc.