![]() ![]() ![]() But before trying this method, make sure that the recovery drive is located in the drive (a separate copy of os installed on it). This fix has worked for many users, so there are high chances that this will work for you as well. If the Disk Utility app didnt work, you can try erasing the device and creating a new partition map using the Terminal app. Fix “Couldn’t Unmount Disk” Error with USB Boot Drive If the issue is still there, then assume that the error is caused by modifying the bootable disk. When using PARTITION function to erase the existing partition, it would proceed 'Preparing to remove partition' but would take ages & never completes it - I would have to quit Disk Utility to force stop it. Once the process is finished, check if the issue has resolved. Disk Erase failed with the error: Couldn't unmount disk'. Or go to Erase in order to format the disk. With the volume unmounted it should allow the process to complete. Step 3: Visit First Aid and try to repair the disk. If that does not work then highlight the volume and click unmount. ![]() Step 2: A boot menu will appear, here, select to choose “Disk Utility”. Step 1: Restart your Mac while pressing and holding the Option key, and then select to choose Recovery partition. If that’s not the case, this fix is worth trying, here’s how to resolve the error with the recovery partition: Mind you, this fix will not work if the error was caused by modifying the bootable disk while creating a partition or formating. If you unmount and disconnect a disk and then reconnect the disk later, Disk Utility rebuilds the disk member automatically if you selected Automatically rebuild when creating the disk set. If you don’t prefer to fix the issue using a USB boot drive or using the command line. You need to click on 'View' within Disk Utility and select 'Show All Devices' before the physical drive is shown on the left pane of Disk Utility. You want to erase the physical drive, but with recent versions of Disk Utility the physical drive is hidden from view by default. Disconnect the disk member that you want to unmount. Fix Couldn’t Unmount Disk Error using Third-Party apps. Best answer HWTech Level 9 51,901 points Run the Apple Diagnostics. Fix “Couldn’t Unmount Disk” Error with Recovery Partition I had the same error while attempting to merge two partitioned sectors on a drive and neither suggestion worked for me. Click the Unmount button in the toolbar or beside the disk set name. Let there be any Mac OS X version as it doesn’t matter (assuming 10.7 to 10.14 and above), this error can be easily resolved only if Disk utility is present on the drive.Īnyways, let’s head towards the actual fixes. press say to continue Method 1: Erase a Volume You see this error message when you want to erase a partition on Disk Utility. Keeping the fact in mind that Disk Utility able to execute from the external drive, we can use it to boot Mac from another bootable drive. Click Done to Continue Erase process has failed couldn’t unmount disk Erase process failed. Good thing is that a valid solution is available that will help us to resolve the “Couldn’t Unmount Disk” Error on Mac. SEE ALSO iTunes Not Showing Album Artwork? Here's how to fix it. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |