How to Fix Sonoma Won't Mount External Drives

I have had an external OWC Thunderbay 4-bay system for years, and it really works great on all of my Intel Macs. But when I connected it to my new Mac, MacBook Pro M1, it refused to mount, and I have no idea why this happened.

Best Answered by

Finley· Answered on Jan 04, 2024

If you are now facing the Sonoma won't mount external drives error, you can first try fixing it in the following two methods: 

Check if your external hard drive is mountable in desktop:

  • Go to "Finder" > "Preferences" > "General"
  • Make sure the "External disks" option is checked
  • Then you may see the eternal hard drive mounted on your desktop

Fix your unmountable external hard drive with Terminal:

  • Go to "Applications" > "Utility" > "Terminal"
  • Type in diskutil list and search for the section labeled /dev/disk_ and remember the disk number
  • Type in diskutil info disk_. You need to replace "_" with your external disk number. 

Once finished, type in type in diskutil eject disk_ to remove your eternal drive.

If you have lost your data during your update or the process to fix your eternal drive not mousting. Use EaseUS Data Recovery Wizard for Mac to help. This software can smoothly and perfectly recover lost files with a few clicks. It can recover data from formatted external hard drives on Mac and regain your precious memory.

Use EaseUS Data Recovery Wizard to recover deleted or lost files easily and quickly.

Tutorials on how to recover lost, deleted, or formatted data from HDD, SSD, USB, SD card, or other storage media on Windows and Mac.

People Also Ask

How to Recover 100GB Folder Deleted from External Hard Drive

When your computer is running slow, you may take it as granted to delete the folder of huge size. But you may regret right after you finish the deletion because you forget to check if there are important files within. But it is possible to recover 100GB folder deleted from external hard drive. Read this post.


Jan 16, 2024

How to Recover Deleted Files from Mac without Software

This post will briefly introduce how to recover deleted files from Mac without software. You can keep on reading if your needs are the same.


Jan 04, 2024

Where Are My iMessage Stored

Sometimes, you may wonder how to find your old iMessage but do not know how. This post will introduce where are my iMessage stored and how to recover it if you have accidentally deleted it.


Jan 04, 2024

How to Recover Deleted iMessage Conversation in Big Sur

If you accidentally have the iMessage, you can restore it from Time Machine backup. You can also use EaseUS Data Recovery Wizard for Mac to recover deleted iMessage in Big Sur.


Jan 04, 2024

Can I Recover Incorrectly Formatted WD Hard Drive on Mac

Trying to convert file format on the hard drive is a risky operation, it is possible to lose data on it. You can recover incorrectly formatted WD hard drives on Mac with EaseUS Data Recovery Wizard for Mac.


Jan 04, 2024

Fix OWC Thunderbay Drives Won't Mount on MacBook Pro M1

Mac users, have you guys ever encountered OWC Thunderbay drives won't mount on MacBook Pro M1? This post will save you with two easy methods. Read on.


Jan 04, 2024