![]() ![]() You should now locate the disc that you want to unmount forcefully.After that, type “ diskutil list” to get a list of all the discs on the Mac.To begin, you must open the Terminal application.Here’s how to unmount a disk using Terminal: ![]() Now, just use it from a Normal Mode whenever you need to unmounts any of your external drive external drive. The first solution you can try to fix “ can’t unmount disk” on Mac is – Use the terminal app.Īll you need to do is, simply open the Terminal from a Recovery Mode when you want to unmount a drive that you’re booted from. #1: Fix Couldn’t Unmount Disk Mac Issue Using Terminal Recover Data from Macintosh HD After Fixing Can’t Unmount Disk Mac When An External Disk Has Failed To Unmount Macintosh HD, What Should You Do? Resolve The Issue By Using A USB Boot Drive.Fix Couldn’t Unmount Disk Mac Issue Using Terminal.Let’s try them one by one and see which one will be helpful for you. Viruses and malware sneak into the Mac drive.Īs you have known the common causes, now it’s time to troubleshoot the above-mentioned error by applying some quick fixes.Īlso Read: Mac Flashing Question Mark Folder Error īelow, you will find some of the helpful ways to resolve couldn’t unmount disk mac OS issue.Interruption during read or write operations.If the driver is used by other applications or processes.Some of the other reasons are shortlisted below: When this error appears, your Mac system will not allow you to perform any task if any app or process using the drive.īesides that, there are some other reasons as well that can also trigger the ‘ failed to unmount because it is currently in use’ issue. Generally, the “ can’t unmount disk” occurs when you try to make some manipulations with your internal or external drive. 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 want to erase or partition your boot disk in Disk Utility because macOS will not unmount the disk. What Does It Mean When It Says Couldn’t Unmount Disk?
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