Downloaded iso not mountable

I have downloaded the ISO to create a DVD for the openSUSE OS. When I try to burn the ISO image to DVD, I get an error saying that it there is no mountable file systems. I have downloaded the image three times and and three times I have the same error. I am currently using a Mac to download the image on and plan using openSUSE on a spare laptop (PC not MacBook) that has no OS installed on it.