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

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 an external hard drive owner and you found that your OWC Thunderbay drives won't mount on MacBook Pro M1, you can first try fixing it in the following two methods: 

Wipe all data on your external hard drive:

  • Carefully connect your external hard drive to your Mac
  • Go to the Applications folder in the Finder and click "Disk Utility"
  • On the storage media management windows, choose the external hard drive that you want to wipe and click "Erase"
  • Tap on the "Security Options" and move your pointer to the right to DOE 3-pass secure erase position
  • Click "Erase" to erase your external hard drive

Reinstall your macOS:

  • Restart your Mac
  • Hold the Command and R keys when your computer restarts. Release them when you see the Apple logo on your screen
  • Now, choose "Reinstall macOS" in macOS Recovery
  • Select your hard disk in the next window after click9ing "Agree"
  • Click "Install" to reinstall your macOS

What to do when you lose important files when you reinstall your macOS? 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 Deleted M4V Files

If you want to have the basic knowledge of M4V format and recover deleted M4V files, you then get to the right place. This post will include both.


Jan 04, 2024

How to Open External Hard Drive on Mac with Terminal [2024 Tips]

In this post, you'll discover how to securely manage your external hard disk using Mac's Terminal commands. Download this free Mac data recovery program to restore up to 2 GB of files in the event that you unintentionally delete your files or format the wrong drive using Terminal commands.


Jan 09, 2024

How to Recover Deleted MOV Files Mac

MOV is one of the most common video files we utilize daily. However, people commonly accidentally delete MOV files once they want to free up their PC memory. This post will introduce the EaseUS Data Recovery Wizard for Mac and help you recover MOV files on Mac.


Jan 05, 2024

How to Recover Files from Dead iMac Hard Drive [2024 Update]

How can I get back my slow iMac data? You can recover data from the iMac hard disk using the EaseUS Data Recovery Wizard for Mac with Bootable Media and a few manual techniques.


Jan 09, 2024

Samsung M3 External Hard Drive Not Recognized on Mac, How to Fix

Suppose your Samsung M3 external hard drive is not recognized on Mac, don't worry! This article will introduce how to fix this error and recover data from the unrecognizing external hard drive.


Jan 04, 2024

How Can I Recover SD Card Data Using Disk Utility on Mac

How to recover SD card data using Disk Utility on your Mac? If your SD card data was lost or deleted, and you don't know what to do, worry not! Read this article to solve your problem!


Jan 04, 2024