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. 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.

What Does It Imply When It Says “Couldn’t Unmount Disk Mac OS”? * Free version of the program only scans and previews recoverable objects. If you need to back up any information on the drive, first connect your drive to a computer that does recognize the drive and transfer the data to a new storage device.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. Choose 'Mac OS Extended (Journaled)' to use the default Mac file system format. Click the 'Format' drop-down menu and select the format you want to use. Select your hard drive from the list and click the 'Erase' tab. Restart 'Disk Utility' if you had to restart your computer to perform a repair and you still don't see your drive.

You may need to restart your computer and follow the prompts to complete the repair.Ĭlick the 'Finder' icon in the Dock and look for your drive in the sidebar. If the operating system already mounted the drive, an 'Unmount' button displays instead.Ĭlick the 'First Aid' tab and select 'Repair Disk,' if available. Select your hard drive, optical drive or other attached drive in the sidebar. Click 'Go' and select 'Utilities' from the drop-down list. Click the background to bring up the Finder menu in the the top bar.

Could not unmount disk macbook air