Mount ISO image on Mac

Method 1:
# hdiutil mount sample.iso

Method 2:
You can mount ISO images in Mac OS X by using Disk Utility, located in the /Applications/Utilities/ directory. After you have launched Disk Utility, navigate from the Disk Utility menu down to “Open Image File” and select your ISO file. The ISO should now appear mounted on the Mac OS desktop. Yes, this works for other disk image files too (dmg, img, etc).

Reference:
http://osxdaily.com/2008/04/22/easily-mount-an-iso-in-mac-os-x/