If your System has malware or spyware related issue, then you can scan your computer with very powerful antimalware tool Reimage that is able to detect/delete all junk files or viruses on your PC. You should protect your device and drive from damages. You can choose either one or all procedure to fix the issue as per System requirement. I hope this article helped you to fix Couldn’t Unmount Disk Mac with several easy methods. You may also read: How to Create Storage Account in Microsoft Azure with Few Mouse-Clicks Conclusion Once done, please check if the problem is resolved. Step 5: After that, go to First Aid to verify the disk and repair if it is necessary. Step 4: Choose Disk Utility from the Boot menu Step 3: Now, select the attached boot drive from the appeared menu Step 2: Restarts your Mac and press & hold the option key Step 1: At first, attach USB boot drive to your drive 4 Solutions to the Error Message Couldnt Unmount Disk When Using Disk Utility on Mac. Procedure 3: To fix couldn’t Unmount Disk error Mac, you can check USB Boot Drive couldnt unmount disk external hard drive mac. Or go to Erase if you want to format the disk. Step 4: Finally, go to First Aid if you want to verify and repair the disk. Step 3: Choose Disk Utility in appeared boot menu Step 2: Now, choose Recovery Partition option from the appeared menu (see screenshot below) 3 Click/tap on the Remove button. When a device cannot erase or partition the drive, users are delivered Couldnt Unmount Disk error or related messages. 2 Right click or press and hold on the drive (ex: 'F') you want to unmount, and click/tap on Change Drive Letter and Paths. Step 1: At first, restart your Mac and press & hold option key 1 Press the Win + R keys to open Run, type diskmgmt.msc into Run, and click/tap on OK to open Disk Management. Step 6: Follow the steps if you want to unmount further the disk on your Mac Procedure 2: You can use Recovery Partition Step 5: After that, replace /dev/diskx with the correct disk number Step 4: Now, type sudo diskutil unmountDisk force /dev/diskx command in command line Step 3: Once list of all disks appears, you need to found the disk that you want to unmount Step 1: At first, access Terminal application You may also read: How to Fix Error 0xc000009a B1 Initialize Library Failed Issue On Windows PCs Ways to Fix Couldn’t Unmount Disk Mac: Tips & Tricks Procedure 1: fix couldn’t Unmount Disk error by using command line Let’s take have a look at solution to fix this issue. In case you have this issue on your PC, you might face several issues including sudden elimination of the running application, lost or corrupted files on hard drive, unable to open particular files or programs and unable to partition Mac HFS as well. The alert message might popup on your Mac when the driver is being used by other apps or process.Īs we know that, Disk Utility is important feature that helps to solve any problems related to disk or storage on your System.It might possible to get this error if boot drive of your System has modified or corrupted. When the device is not allowed to repair specific permissions or directories in Disk utility, then might popup this error message on your Mac screen.When a device cannot erase or partition the drive, users are delivered Couldn’t Unmount Disk error or related messages.Reasons behind Couldn’t Unmount Disk Error on Mac Procedure 3: To fix couldn’t Unmount Disk error Mac, you can check USB Boot Drive.Procedure 2: You can use Recovery Partition. Procedure 1: fix couldn’t Unmount Disk error by using command line The volume 'Catalina' on disk2s6 couldnt be unmounted because it is in use by process 689 (kextcache) Couldnt unmount disk.Ways to Fix Couldn’t Unmount Disk Mac: Tips & Tricks.Reasons behind Couldn’t Unmount Disk Error on Mac.And I can't erase the drive to get a brand new drive to work with. I backed up my startup drive to this drive so I could wipe and reinstall OSX on my new SU drive but now I can't delete items off the backup drive because the message says I can't delete backup items. I have backed it up and using DU tried to erase it = by both highlighting the drive identifier and the name - in both cases, whether I try to erase disk or set it to erase to one partition, I get a message saying it can't do it because it can't unmount the disk. I have a MacPro and 4 drives inside it, one of which I need/want to erase.
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