How to make external hard disk read only | Official Apple Support Communities https://discussions.apple.com/thread/5280806?tstart=0
WD Support > Downloads > My Book > My Book Studio Edition http://support.wdc.com/product/download.asp?groupid=113&lang=en
Create an ISO image on Mac OS X using built-in Disk Utility App – Club CDFreaks – Knowledge is Power http://club.cdfreaks.com/f59/create-iso-image-mac-os-x-using-built-disk-utility-app-200501/