dmg, set the Image Format to “ compressed” instead. iso, make sure to choose DVD/CD master as the Image Format. In the pop-up window, select Desktop as your destination.DMG or ISO file you would like to convert, select it and click on the Choose button. In the menu bar at the top of the screen, select Images -> Convert. Just launch Disk Utility (in /Applications/Utilities).Sit back and wait for the process to complete. Hdiutil convert ~/Desktop/filename.iso -format UDRW -o ~/Desktop/filename.dmg dmg, just execute the following command in the Terminal window: If you need to convert a disk image from. When the process finishes, you’ll get an ISO image that is compatible with Windows, Linux, Ubuntu and Mac. Hdiutil makehybrid -iso -joliet -o ~/Desktop/filename.iso ~/Desktop/filename.dmg Enter the following command into the Terminal window, assuming that you’ve put the.Just press Ctrl + Alt + T on your keyboard to open the Terminal.Mac OS X has a command line tool called hdiutil which allows you to create, mount and convert different types of disk image with ease. dmg format using the Terminal or Disk Utility on Mac OS X. iso on Mac? Don’t bother downloading any third party software, you can easily convert. iso image, and now you want to convert it to.