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Fix USB Flash Drive not Showing up on Mac (New for macOS 12)

Updated on Thursday, May 12, 2022

iBoysoft author Amanda Wong

Written by

Amanda Wong
Professional tech editor

Approved by

Jessica Shee

How to Fix the Issue of a USB Flash Drive Not Showing Up on Mac (New for macOS 12 Monterey)

Summary: This article will help you fix the issue of a USB flash drive not showing up or not being recognized on your Mac. Also, you can learn how to find the USB flash drive on Mac with iBoysoft Mac Data Recovery and get your data back.

usb flash drive not showing up on Mac

Table of Contents:

Normally when you plug a USB flash drive into your Mac you will see the connected USB storage device on Mac's desktop or in Finder and then access files on it.

However, if you have noticed that your USB drive is not even showing up on your Apple computer it can be a major headache. A few Mac models have reported having this problem after upgrading to macOS 12 Monterey. How can we make your Mac detect the USB drive and then easily locate it in Finder or on the desktop?

We offer this detailed guide in the hope of re-enabling the USB drive and having it work normally on your Mac again. You will also find it helpful for fixing the USB Drive Not Working Issue on Macs running macOS 12 Monterey.

How to fix the issue of your Mac not recognizing a USB flash drive?

Now let's dive into 6 detailed solutions.

Fix 1: Check connections

A good connection is a mandatory condition for USB flash drives to work on Mac. First, let's check the connections between any USB storage drives and your Mac to determine if a poor or loose connection is causing the Mac to not recognize the USB flash drive.

check usb connection

  1. Try to re-plug the USB flash drive into your Mac and see if it shows up.
  2. Try to connect the USB flash drive to a different USB port.
  3. Try another USB cable to connect the USB flash drive if it has one.
  4. Try to connect the USB drive directly to your computer and not via a USB-C adapter or USB hub.
  5. Restart your Mac to reset the USB ports in the hope of detecting the USB drive.

Fix 2: Reinstall or update USB driver

When your USB device is not detected by Mac you should check to see if any USB driver updates are available. Please try the following steps:

  1. Click on the Apple in the upper left corner of the screen.
  2. Select "Software Update..."
  3. Any available updates will be listed and will be downloadable or you will be told your software is up to date which is good information to know.

If you have updated your Mac to macOS 12 Monterey however you may still not be able to find the USB flash drive. This can be due to known macOS 12 bugs causing the Mac USB port not to work and then of course your Mac will fail to recognize a USB flash drive.

To fix this there are threads on Apple's support page that explore the topic at length. You could downgrade your macOS, reinstall macOS or upgrade macOS to avoid the macOS 12 bug for example.

After attempting the above-mentioned solutions to fix the issue of an unrecognized USB drive how do we check to see if it is detected on the physical level even though it may still be logically corrupt? Download install and launch iBoysoft Mac Data Recovery on your Mac and see if it is detected by iBoysoft Data Recovery.

If your USB drive is recognized by iBoysoft Data Recovery all you need to do is follow the wizard to recover data from your USB flash drive and then reformat it afterward in order to reset the file system.

If your USB drive is not detected by iBoysoft Data Recovery as well as your Apple's OS send it to a local expert for repair on the physical level.

How to fix the issue of your USB flash drive not showing up on a Mac?

Now that your Mac is connected to the USB flash drive if you still can't find the USB drive on Mac you need to try the following simple solutions to fix the issue:

Fix 1: Change Finder preferences to show USB flash drives on Mac desktop

If you can't find the connected USB device on the Mac desktop then you should go to Finder > Preferences > General and make sure the "External disks" option is checked. Then you'll see the connected USB flash drive show up on the Mac desktop.

show-external-disk

Fix 2: Change Finder preferences to show up USB flash drive in Finder

Can't find the USB flash drive in Finder? Go to Finder > Preferences and then switch to the Sidebar tab and check the "External disks" option under Locations.

show usb in Finder

You will then see the connected USB flash drive in Finder's sidebar.

Fix 3: Repair USB flash drive with First Aid

If you can see the USB flash drive but it is not fully mounting in Apple's Disk Utility you can try the built-in First Aid within the operating system to repair the errors on the USB flash drive as follows:

  1. Launch Disk Utility from Utilities in the Applications folder.
  2. Select the corrupted USB drive from the sidebar.
  3. Click First Aid at the top of the window and then click Run. Wait until the repair process finishes.
  4. First Aid will give a final status message upon completion while noting either the success or failure of the repair.

Fix USB drives with First Aid

Fix 4: Reformat USB flash drive

If First Aid was unable to repair the errors on the USB drive it means that the file system or partition table of the flash drive has been damaged seriously. Commonly to fix the USB flash drive not showing up on Mac you have to reformat it.

But wait reformatting will wipe all data off the flash drive! Therefore we first recover data from the USB drive with iBoysoft Mac Data Recovery - a professional USB drive data recovery software.

Three simple steps to recover data from a USB flash drive that's not showing up:

Step 1: Download install and launch iBoysoft Data Recovery for Mac.

Step 2: Select your USB drive and click the Scan button to scan all data on the USB flash drive.

select a disk to scan

Step 3: Preview the search results select the files you need and click Recover to get them back.

recover files

After you successfully retrieve data from a USB flash drive that's not normally mounting it is time to format the USB drive on Mac. After the reformatting process is finished the USB flash drive will show up on your Mac correctly.

Finally, if the USB flash drive is not showing up in Mac Disk Utility System Information or in the iBoysoft data recovery app it may have physically failed. If you don't have any important data you can simply replace the damaged USB drive with a new one. But if you have anything important on it then you'd better send it to a local specialist for data recovery help.

Bonus tips for using the USB flash drive

USB flash drives, pen drives, and jump drives are convenient but they are also fragile devices to store data on as they are small and susceptible to damage. How can we protect it from corruption and subsequently not showing up on our Mac?

Please follow these tips:

  • Don't put USB flash drives in the pockets of your pants or T-shirt especially if it is otherwise unprotected. The goal is to keep your drive away from moisture and dust either from your body clothes or the environment. More importantly, if the flash drive is not in your pocket you will avoid damaging it when you sit down or bump into something.
  • Don't remove the USB flash drive from the computer without safely ejecting it first. Even though it's inevitable that portable drives are plugged in frequently you can make sure you eject them safely and properly every single time.
  • Most importantly create a backup of your data. Although you may have been taking good care of your USB flash drive you should know that it has a limited life span and accidents do happen. Therefore to avoid unexpected data loss you'd better make regular backups of your files.