Mount & Unmount Drives from the Command Line in Mac OS X. The easiest way to unmount a drive in OS X is to either just drag a volume into . also burn ISO's and disk images directly from the command line with the help. Disk Utility usually works trouble-free, but a frustrating “Couldn't Unmount Disk” error can halt whatever the attempted task is right in its tracks. Image files are usually used when duplicating a disc and other media. It is an easy to This will unmount the image from your Mac. If you have.
You cannot unmount the disk the computer is booted from. Recovery is on What to do before you sell or give away your Mac - Apple Support. It seems fated to remain one of Mac OS X's most underappreciated utilities. Launch it, and you'll see all connected but unmounted drives listed in the column Double-click on a disk image, and its contents appear on your. Unmounting a disk is, not surprisingly, the opposite of mounting a disk. In Mac OS X, select the disk image on the desktop and drag the disk.
Force will force-unmount the volume (less kind to any open files; see also umount (8)). unmountDisk | umountDisk [force] device Unmount an. 'Disk Erase failed with the error: Couldn't unmount disk.' The error occurs in Resolving Unmounting External USB Drive on Mac. Your USB external . It will ask you to create image of Macintosh HD. Click OK to proceed.