There are many different type of images that you may need to mount on your Mac. Mounting an ISO on a Mac is simpler than you may think. Simply, open Disk Utility (/Applications/Utilities/). From Disk Utility, go to File and click “Open Disk Image.” Disk Utility is not limited to ISO images, but can also open dmg and img files.
If you prefer the command line, input the following line into your shell: hdiutil mount sample.iso. Remember to specify the path of your iso file, using the above command assumes the iso is in your home directory. If the iso is on your desktop, input: hdiutil mount ~/Desktop/sample.iso. That will mount the sample.iso file that exists on the Desktop.