Summary: This blog explains five best ways to resolve the "external hard drive not mounting" issue on Mac.
It also shares a reliable software-based method to recover data from unmounting (or un-mountable) USB hard drive on Mac. Free evaluate the best Mac external drive recovery software from the below.
When you connect an external hard drive on Mac, it will show up on Desktop, Finder, and Disk Utility. But sometimes the external drive won’t appear on any of these places. Consequently, data inside the unmounted external hard drive turns inaccessible. The contained files and the external drive’s integrity comes to a stake.
Don’t worry, read and apply the below fixes to resolve Mac unmounted external drive issue.
1. Change macOS Settings
Ensure Finder preference to show external disks on Desktop or Finder is enabled.
Ensure Disk Utility’s View menu has “Show All Devices” option selected.
2. Reset Mac Firmware Settings
Reset NVRAM (Non-volatile RAM) & PRAM (Parameter RAM).
Reset SMC (System Management Controller) on your Mac.
3. Fix External Hard Drive Connectivity Issue
Ensure proper connectivity of your external hard drive to your Mac.
4. Troubleshoot External Hard Drive
Mount the external hard drive from Disk Utility.
Repair hard drive from Disk Utility.
Check the SMART status of the external hard drive if it unmounts intermittently.
5. Recover Data from Non-Mounting External Mac Hard Drive
Ensure the external hard drive is detected in Disk Utility, then fulfill the following data recovery prerequisite.
Leverage the Mac external drive recovery software to recover data from the not-mounting external storage drive.
Note: *Trial software allows you to scan storage drive and preview scanned files. Activate Stellar Data Recovery Professional for Mac by using its activation key and recover the files.
Watch the next video to know more about the software and its usage.
This blog presented 5 different methods to troubleshoot ‘external hard drive not mounting’ issue on Mac. You can begin with fixing the external hard drive connectivity issue, changing macOS settings, resetting Mac firmware settings, troubleshooting the drive, and finally recovering data from the hard drive.
If the external hard drive is not detected in Disk Utility, then it may have a hardware issue. And if the basic hard drive connectivity fixes don’t resolve the problem, then you need to try Stellar Data Recovery software for Mac.
We hope this blog post helped you understand the possible reasons, as to why macOS can’t mount the external drive on Mac and how to troubleshoot and recover the unmounted Mac external drive. For any query, write to us in the comments section below.
Vishal is a data recovery expert @Stellar. He addresses data loss scenarios on a Mac. He intends to help people solve their macOS problems. Besides, Vishal prefers to read about astronomy and autobiography, and his favorite is Steve Jobs - The man who thought different written by Karen Bluementhal.
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