MacOS – Install Ghostscript on OS X 10.9 using DMG file

All volumes, including DMGs, are mounted in /Volumes.

You can get a list of mounted volumes by typing ls /Volumes in Terminal.

You can navigate to a Disk Image using cd /Volumes/nameOfImage.

First, mount the dmg image : sudo hdiutil attach <image>.dmg

The image will be mounted to /Volumes/<image>. Mine contained a package which i installed with: sudo installer -package /Volumes/<image>/<image>.pkg -target /

Finally unmount the image: sudo hdiutil detach /Volumes/<image>.