How to create iso image on Mac OS X
One of many great things about Mac is that you can do a lot of stuff just after launching your computer for the first time. So here is another one, you can create iso image of your CD/DVD just using apps which are already in the OS. Lets start then:
Put the disk into your drive. Go to Apps -> Utilities -> Disk Utility. Choose your disk from the list on the left and click New Image.