You can use a USB boot device in this manner. If the disc to be edited is the boot drive, the most straightforward way is to boot the Mac system from another drive and then run Disk Utility on the disc. Method 1: Resolve The Issue By Using A USB Boot Drive.
Resolve The Issue By Using A USB Boot Drive. Let’s move on to troubleshoot this issue: There is the risk of losing data, and the only way to protect your data is to create a full backup. You should backup disk data before attempting to fix can’t unmount disk mac terminal problem with the help of the below solutions. 
Virus and malware sneak into the Mac drive.Īs you have known the common causes, now it’s time to deal with the above-mentioned error by applying some quick fixes. If the driver is used by other applications or processes. There are numerous reasons that can trigger the ‘ failed to unmount because it is currently in use’ issue.īut below I have shortlisted the three major factors behind the occurrence of this problem. Essentially, your Mac’s erase process has failed. If you get an error message saying can’t unmount disk mac terminal, it usually means a process on your Mac is attempting to modify your boot disk but is unable to do so because macOS won’t allow the disk from which it booted to be unmounted.įor example, you won’t be able to erase or partition your boot disk in Disk Utility because macOS will not unmount the disk. What Does It Imply When It Says “Couldn’t Unmount Disk Mac OS”? * Free version of the program only scans and previews recoverable objects. #Erase process has failed mac internal hard drive for mac
In addition, here you will also get the best Hard Drive Recovery Tool for Mac to recover deleted data after solving couldn’t unmount disk mac OS error.
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