Updated November 03, 2021 · Published May 04, 2014
You can use hdiutil to manually mount and unmount disk images, using the commands below. When mounting a file, make sure you replace filename with the correct file name. The same command works for both DMG and ISO files. When unmounting a disk image, be sure to replace disk1s1 with the correct volume identifier that will be shown to you after you mount the image.
Mount a DMG or ISO file
hdiutil attach filename.iso
Unmount the disk image
hdiutil detach /dev/disk1s1