Disk erase failed couldn t unmount disk12/11/2022 ![]()
Other factors you should look into include corrupted system files, bad hard drive sectors, or insufficient permissions. This is because the malware might be making changes to your hard drive without you knowing it. Disk erase failed couldn t unmount disk software#When a malicious software is running in the background and wreaking havoc on your Mac, you might get the “Couldn’t Unmount Disk” error when you try to do something with your hard drive. For example, a file from the disk you are trying to erase could be open, which means that you can’t proceed with the erasing unless all the files are closed.Īnother possible reason is the presence of malware. When your Mac is getting the “Couldn’t Unmount Disk” error when using the Disk Utility, it is possible that the boot drive cannot be modified because it is being used by some process or an application. What Causes the “Couldn’t Unmount Disk” Error in Disk Utility for Mac? Once this pops up, the current process gets halted and could no longer proceed, affecting any troubleshooting process or disk repair you might be doing.
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