Fixed Erase Process Has Failed on macOS High Sierra

Fix Formatting Process Has Failed click Done to Continue

In this article, I’m going to show you how to fix Erase Process Has Failed during Partitioning macOS High Sierra hard drive on Disk Utility. You might have experienced this issue on the later version of MacOS (macOS Sierra, Mac OS X El Capitan, Mavericks, Yosemite”. I’m not really 100% sure that why this error occurs sometimes. In some cases, it’s because of disk scheme and format. In this guide, I’m going to show you two methods that really help you to sort out this frustrating problem.

Fixed Erase Process Has Failed Click Done to Continue

This error occurs differently for the people but the solution is almost the same. This guide is going to assist you to figure out this matter.

  • Erasing “Untitled 3” and creating “Untitled 3”
  • Erase process has failed. Click Done to Continue
  • Erase process has failed couldn’t unmount disk
  • Erase process failed. “press say to continue

Method #1. Erase a Volume

You see this error message when you want to erase a partition on Disk Utility. If you want to fix it then navigate to your windows operating system and open Disk Management. Create a new volume and choose the File System “exFat“. Check the step by step guide on how to create a new volume on Windows 10. Once the partition has been created, boot into macOS High Sierra Bootable USB installer. Or if you are trying to build a Hackintosh and having this problem then boot via USB installer.

Fixed Erase Process Has Failed on macOS High Sierra

Create a New Volume

On the Disk Utility window select the partition you’ve created on Windows then click on Erase tab. As a name, choose any name for the volume you want and as a format select “MacOS Extended Journaled“. Select the scheme “GUID Partition Map” and click on Erase button.

Fixed Erase Process Has Failed on macOS High Sierra

macOS High Sierra Disk Utility

If this solution doesn’t work for you or even you run Windows operating system and you’re on an actual Macintosh environment so follow the 2nd method that I’m pretty sure will ease you.

Method #2. Erase the Whole Drive

If the first method didn’t work for you, just backup or transfer all your data from the target drive to save place like an external HDD. Once you’re done, follow the step below.

Step #1. Click on small down arrow at the top-left corner of the Disk Utility window and select Show All Devices.

Fixed Erase Process Has Failed on macOS High Sierra

Show All Drives

Step #2. Select the main hard drive, not the volume then click on Erase tab. A small window will appear now. As a name type any name you want and as format select Mac OS Extended Journaled, as a scheme select GUID Partition Map. Click Erase button and wait for a while.

Fixed Erase Process Has Failed on macOS High Sierra

Erase USB Installer

As you can see the screenshot down below has formatted successfully without any issue.

Fixed Erase Process Has Failed on macOS High Sierra

Mounting Disk is Successfully Done


In this guide, we’ve covered some tips and tricks Fixed Erase Process Has Failed, Click Done to Continue on macOS High Sierra or older version of Mac Operating system on Disk Utility Window. Again, if you’ve got any kind of issue on this topic or you know another method please let us know in the comment section down below this post. We’ll be so happy to hear any kind of feedback from you guys.

Mukhtar Jafari is the CEO of and he is a blog writer on different technology platforms such as Android, iOS, PC and Macintosh. He would like to share his experiences with IT enthusiast via this blog. He loves IT stuff and currently studying CCNA, Linux and MCSA.


      1. Brad

        Yes. I can’t see any volumes on the drive, just that main top USB level. When I try First Aid it completes and says there are no issues. When I try to erase, it tells me I’m unable to write to last block of device

  1. Bonnie Reply

    THANK YOU Mukhtar! You have helped solve a very frustrating dilemma. The most important step was to select the whole drive not the volume!

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