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4TB SanDisk SSD (APFS) not mounting on Mac, how to recover data?

No backup of over 2TB of video files. HELP! Can my files be recovered and/or the disk re-mounted through the Terminal without erasing anything? 4 partitions on the disk.

Best Answered by

iBoysoft author Amanda Wong

Amanda Wong

Answered on Wednesday, September 13, 2023

You cannot access the data if the APFS partition on the SSD is not mounted on your Mac. Thus, recovering data from the unmounted APFS drive is a priority and then you can repair the drive with First Aid, fsck command, safe mode, reformatting, etc.

APFS container won't mount possibly due to errors on the SSD such as file system damage, catalog file corruption, Disk Utility failures, system malfunctions, virus attack, and so forth. If it is the internal SSD on your Mac, you may find the AppleAPFSMedia not mounted or the Macintosh HD not mounted in Disk Utility.

Once you encounter the APFS not mounting issue on your Mac, you should recover data from the drive ASAP with the professional data recovery software - iBoysoft Data Recovery for Mac. You will need to reboot Mac into macOS recovery mode if it's a startup disk. 

Read moreHow to Run iBoysoft Data Recovery in macOS Recovery Mode?

  • Then, try these solutions to get rid of the APFS SSD not mounting issue:
  • Repair APFS SSD with Disk Utility's First Aid.
  • Run the fsck command in Sigle User Mode.
  • Boot Mac into Safe Mode.
  • Reformat the APFS SSD on your Mac.

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