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When you attempted to mount your hard drive on Mac, did you receive a 49153 error? Either your external hard drive or Mac OS is malfunctioning. Data loss is possible in either scenario, but there is still hope!

DiskManagement Distenter 49135 is a common disk problem, and in this article, we'll discuss its various causes and solutions (without data loss). Keep reading.

Error 49153 in means?

After a failed partition shrink, you may get the error 49153. Some users have reported seeing the issue after using Disk Utility to reduce a partition.

Although malware entities and system garbage may also play a role, experts believe that locally stored snapshots of Time Machine backups on the system disk are the most likely source of error 49153.

fix error 49153 on Mac

A pro tip is to scan your Mac for malware, viruses, and other threats that could slow down your system or compromise security.

What causes error 49153?

It happens when you use the Mount command in your Mac's Disk Utility application. There are problems with the hard disk blocking access to the data, as indicated by this error. It happens because of mistakes made during disk management operations, including formatting, mounting, or partitioning.

There are a few potential solutions to this problem; if none work, formatting the drive is the next best option. Since reformatting will delete everything, you must first use a data recovery application to retrieve all the files from the drive.

How to fix error 49153?

There are a few different approaches to fixing this error code, but they all risk worsening your data. We recommend booting your external hard disk into read-only mode and transferring your files to a new drive or the cloud.

Fix1. Connect Your Drive to Another Mac:

Either your drive or Mac can be the source of Disk Utility errors. Connect the hard disk to a different computer, preferably a PC, to see what options it displays. Your drive may be defective if it fails to read or write on other computers.

If it functions well on another Mac, the problem could be an outdated app or software on your computer. If it works on a PC, the issue is probably one of formatting; we discuss this and other typical DiskManagement Disenter issues further in this post.

Fix2. Restart your Mac:

macOS became stalled while trying to recognize your drive due to a momentary bug or problem. You may also have many background processes preventing macOS from recognizing and mounting your device.

It's possible that restarting your computer will get it up and running again. All open programs will be terminated, and the computer will restart.

Fix3. Repair your drive in Disk Utility:

Disk Utility's First Aid tab lets you scan for and correct errors on your drive and fix problems with file permissions, directory structure, and other disk-related issues that could be causing "Could not mount error 49153."

You should use Disk Utility to try to fix your drive. Here's what you should do:

Open Finder > Applications/Utilities folder to access Disk Utility.

Select View > Show All Devices.

Choose the hard drive, then click the First Aid > Run button.

fix error 49153 on Mac

As each volume is scanned and repaired, move on to the next in the list until the physical disk is examined.

After the fix is complete, ensure the drive or volume is mounted. If not, choose it and try clicking Mount again.

Recover Lost Data after Erasing Hard Drive on Mac

Recover Lost Data after Erasing Hard Drive on Mac

Recover lost data after you erase hard drive or repair hard drive with Disk Utility - get all lost files back.

Fix4. Startup in "Safe Mode":

Troubleshooting in Safe Mode is a frequent practice since it allows you to quickly check for hard disk issues, clear system caches, and eliminate the possibility of interference from third-party software. Start your Mac in Safe Mode. Then, see if the external drive or USB device mounts after a normal restart.

Fix5. Use a Third-Party Mac Repair Tool:

Suppose you've already tried the first two options above and are still getting the error 49153, you can use a Mac repair tool like a Mac repair program.

DoYourData NTFS for Mac is an all-in-one Mac disk management tool. It can help you open disk, mount disk, repair disk, etc.

If the hard drive is a NTFS hard drive, just click Enable Writable for the drive.

fix error 49153 on Mac

If the hard drive is unmounted, just click Mount button.

fix error 49153 on Mac

And this software also can help you repair damaged hard drive, just click on First Aid button to repair the damaged hard drive.

fix error 49153 on Mac


When you mount an external hard drive on your Mac, you may encounter error 49153, you can use Disk Utility to repair the damaged hard drive. If the external hard drive is an NTFS hard drive, you can download and install an NTFS for Mac tool to enable writable for the NTFS drives. Then you can mount the NTFS external hard drive on your Mac without any issue.

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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