Resolving Partition Unmounting Failures
If you're trying to format a drive for an OCLP install and get the error 'Couldn't be unmounted because it's in use', a background process is locking the disk.
The Fix:
- Quit All Apps: Ensure no apps (especially Finder or Terminal) are accessing files on that drive.
- Force Unmount via Terminal: Open Terminal and run
diskutil unmountDisk force /dev/diskX(replace X with your disk number fromdiskutil list). - Use Recovery Mode: If you're trying to format your main system drive, you must boot from the OCLP USB installer and use the Disk Utility there. You cannot unmount the drive you are currently booted from.
Original Question: ""couldnt be unmounted cause its in use" What do I do in this situation?"
 | It keeps showing this how do I continue? I keep trying to figure this out but it's taken awhile. Can someone help please? [link] [comments] |
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