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Not seeing your external hard drive on your Mac is very frustrating. Don't let the problem with mounting get in the way of getting to your vital info! Imagine how much better it would be to quickly fix this problem and be able to view your files without any issues again.

When your external drive doesn't show up, this guide will walk you through the most common problems and give you valuable tips on how to fix them. We have easy-to-follow steps, from checking the physical links to looking into software updates. Therefore, if you want to eliminate the growing issue for good and use your Mac to its fullest, let's get started!

Fix External Hard Drive Not Mounting on Mac

Solutions to Fix External Hard Drive Not Mounting on Mac

1. Check The Physical Connection

Ensure that both ends of the USB or Thunderbolt cord connecting the external hard drive to your Mac are securely plugged in. Use a different cable to ensure that the link is working. It would be helpful to test the portable hard drive on another computer.

2. Check to See If the File System Works

Go to Applications > Utilities > Disk Utility to open Disk Utility. Select the external hard drive. Check the format of the file system. If the format doesn't work with macOS (like NTFS), you might need to change the drive to something that does, like exFAT or APFS, macOS Extended (Journaled). Back up critical files before erasing the drive because it will delete everything.

Step 1. Open Disk Utility and find the external hard drive on the left bar.

Step 2. Select the external hard drive, then click on Erase button.

Fix External Hard Drive Not Mounting on Mac

Step 3. Select a file system, then click on Erase button again.

Fix External Hard Drive Not Mounting on Mac

Step 4. Once the process gets finished, click on Done button.

Fix External Hard Drive Not Mounting on Mac

If you want to mount and read-write a NTFS drive on Mac without formatting, you can use a third-party NTFS for Mac tool to help you. Follow the steps below:

Step 1. Download and install the best NTFS for Mac tool - DoYourData NTFS for Mac, then open it from Launchpad.

Step 2. Find the NTFS drive, select it, then click on Mount button.

fix external hard drive not mounting on Mac

Step 3. To allow your Mac to read-write the NTFS drive, just click on Enable Writable button.

read-write external hard drive on Mac

3. Fix Disk with Disk Utility

In Disk Utility, choose the external hard drive that is giving you trouble.

Click on Mount button to see if you could mount the external hard drive.

Fix External Hard Drive Not Mounting on Mac

If the Mount button is grayed out, click on First Aid button.

Fix External Hard Drive Not Mounting on Mac

Follow the steps shown on the screen to run First Aid and fix any disk problems it finds.

4. Clear the SMC and NVRAM/PRAM

Resetting the SMC, NVRAM, or Parameter RAM (PRAM) can fix system problems. Look at Apple's official documentation or support materials to reset the SMC and NVRAM/PRAM for your particular Mac model.

How to Reset Mac SMC

How to Reset Mac SMC

Follow this guide to reset Mac SMC to fix issues and make get a new start with your Mac, no data loss.

5. Check for New Versions Of Software

You should ensure that your macOS and any software you need, like Disk Utility or drivers, are current. If there are updates, install them and then restart your Mac for the changes to take effect.

6. Try It Out on A Different Mac Or OS

Connect the portable hard drive to a different computer, like a Windows or Mac. You can use this to determine if the problem is only with your Mac or if the external hard drive is broken.

7. Check Mac Finder Settings

If the external hard drive is mounted in Disk Utility, but it is not showing up on desktop or Finder’s sidebar, open Finder Settings to check if you’ve selected External disks.

Step 1. Open a Finder, then click Finder on Apple menu, choose Settings.

Fix External Hard Drive Not Mounting on Mac

Step 2. Click General and Sidebar, make sure External disks is selected.

Fix External Hard Drive Not Mounting on Mac

Don't freak out if your Mac won't recognize your external hard disk. The solutions listed above will help you repair this disk issue most of the time. You may also utilize Data Recovery if you are concerned about data loss when the drive is unmountable. No matter what kind of disk issue you run across, you should always attempt data recovery in the event of a data loss.

Recover Data from Erased External Hard Drive on Mac

Getting back data from an external hard drive erased on your Mac might seem complicated, but if you follow the steps, you can get your important files back. To get back info from an external hard drive that has been formatted, do these things:

1. Choose trusted software that can recover lost data and works with macOS. Install the software on your Mac. (Here, yo can download Do Your Data Recovery for Mac)

2. Use the right cord or adapter to connect the formatted drive to your Mac. During the recovery process, make sure the link stays stable.

3. Open the data recovery tools that you have on your Mac. The software should be able to find the attached external hard drive. Choose the drive as the one you want to rescue.

Recover Data from Erased External Hard Drive on Mac

4. Start a full or deep scan of the external hard drive that has been formatted. The time this takes may depend on how big and complicated the drive is.

Recover Data from Erased External Hard Drive on Mac

5. Once the scan is done, the program will show a list of recoverable files and folders. Use the preview function to check that the files are correct and valuable before you start the recovery process.

Recover Data from Erased External Hard Drive on Mac

6. Pick the files and folders you want to return from the formatted external hard drive. Pick a safe spot on your Mac or another storage device to save the data that you've retrieved.

7. Let the software finish recovering the files. Monitor the process and ensure all chosen files are retrieved without problems.

8. Once the recovery process is complete, check the restored data carefully to ensure it is correct and complete. Open files and folders to ensure they can be reached and are finished.

9. As a safety step, you should copy the recovered data to a different storage device or in the cloud to avoid losing it again.

Conclusion:

Problems with an external hard drive not mounting on your Mac can be annoying. But if you follow the proper steps to fix the issue, you can return to your essential files. We've discussed several ways to resolve this problem, from checking the hardware connections to using data recovery software for formatted drives. By doing these things and regularly backing up your files, you can ensure that your external storage devices work better and get the most out of your Mac.

FAQs About Fixing External Hard Drive Not Mounting on Mac

1. Why not the external hard drive mount on my Mac?

It's important to understand the root cause of the problem before attempting to repair it. Being aware of what caused the problem can help you to be more cautious in the future. Here are some of the most frequent causes of an external hard drive not being able to be mounted on a Mac:

  • Faulty external storage drive connection.
  • The drive has an incompatible file system format.
  • There was an issue with the storage device's file system.
  • Incompatibility with the storage device's driver software.
  • The macOS is outdated.

2. How to fix external hard drive is not mounting or not showing up on Mac?

Here are some solutions to fix external hard drive not mounting on Mac:

Method 1: Check The Connecting Cable

The first step is to make sure it's connected; however, the connection might be the problem. One of the most common reasons drives fail to mount is that the drive isn't receiving enough power.

Older Macs may need a USB power cord that separates into two USB ports to provide sufficient power to the disk. Try to connect the drive with an alternative cord to see if it resolves the problem. Make sure the port on your Mac isn't the problem, too. Try using a different port to connect.

Method 2: Restart Mac

Restarting your Mac is another easy cure. You should use this method instead to fix any system-related issues that prevent detachable disks from showing up on the desktop or Finder.

  • Firstly, disconnect your Mac's external hard drive or solid-state drive (SSD).
  • Secondly, go to the Apple menu and pick Restart.
  • Uncheck the item next to Reopen windows when logging back in, then select Restart.
  • Wait for the desktop to appear when your Mac has finished restarting. Connect the external hard drive once again.

Method 3: View The Preferences or Settings

Is your external hard disk not showing up in the Finder or on the desktop? That's a simple problem to resolve.

  • Open the desktop or Finder, depending on your preference.
  • Select Preferences or Settings from the Finder menu bar.
  • Check the box next to External disks in the General and Sidebar section.

Method 4: Using Disk Utility

Using Disk Utility to resolve a wide range of Mac issues, including those involving external drives, is often the most effective solution. This program may assist you in accessing and repairing various disk problems by examining partition Macs and doing further checks across the system. An external hard disk may be mounted using the following instructions:

  • Launch Disk Utility on your Mac by clicking the Go button at the top of your desktop and selecting Utilities.
  • To see a list of all attached drives, choose "Show All Devices" from the View menu.
  • In the left sidebar, click on the grayed-out external hard drive icon.
  • Keep an eye on the Disk Utility window's top right-hand corner and select Mount.

Your external hard drive may not display in Disk Utility if you notice that the whole disk is missing. This indicates that physical damage has occurred to the hard drive. A local data retrieval service is needed in this instance. It's possible to use another method if the Mount option is grayed out yet the external hard disk is visible in Disk Utility.

3. How to recover lost data after erasing the external hard drive using Disk Utility?

During the process to fix the unmounted external hard drive on Mac, you may need to erase the drive using Disk Utility. Data loss will happen. Don’t panic, data recovery software can help you unformat the external HDD or SSD and get all lost data back.

  • Download and install Do Your Data Recovery on your Mac.
  • Open Do Your Data Recovery, select the erased external hard drive.
  • Click on Scan button.
  • Recover lost files after scanning.

4. How to force mount an NTFS drive on Mac?

NTFS is a Windows-based file system and is not supported by macOS. If you want to mount an external hard drive which has been formatted to NTFS, just use NTFS for Mac tool to help you mount the NTFS drive on your Mac. NTFS for Mac tool also can help you add NTFS read-write support on Mac so that you can write data to a NTFS drive on Mac without formatting.

DoYourData Author

Written & Updated by Nancy

Nancy works as a tech columnist at DoYourData. She is familiar with macOS and Windows OS and writes computer solution, data recovery, disk clone, data erasure articles for DoYourData. She is a big fan of Mac products and is fond of testing utilities software (such as cleaner, recovery, eraser, NTFS for Mac, video editor, etc) on Mac.

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