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 DiskUtility. 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’tworry, 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.
Open Finder from Dock. From the top Menu Bar, go to Finder > Preferences.
On the “Finder Preferences” window, click the General tab.
Under the “Show these items on the Desktop” section, select the “External disks” checkbox. Your Desktop will now show the external hard drive icon.
Click the Sidebar tab. Under the Locations section, select the “External disks” checkbox. Your Finder sidebar will now show the external hard drive.
Ensure Disk Utility’s View menu has “ShowAllDevices” option selected.
Press Command + Space Bar keys to open Spotlight.
Type ‘disk utility’ and hit Return to open Disk Utility.
Click the View menu located at the top left corner of Disk Utility and select “Show All Devices”. Your Disk Utility’s sidebar will now show the external hard drive.
Select the types of files present on the drive then click Next.
Select the not-mounting external hard drive then toggle on Deep Scan.
Click Scan. And let the scan to finish till completion.
View the scanned items in Classic, File, or Deleted List. Once a view mode is selected, navigate the folders then preview any scanned files from the right pane.
Select all the required files by clicking their corresponding checkbox, then click Recover. Specify a save destination then click Save.
Note: *Trial software allows you to scan storage drive and preview scanned files. Purchase the software then activate it using its activation key to recover and save 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 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 autobiographies, and his personal favorite is of Steve Jobs.