Background - Daughter just bought a new iMAC desktop - now have a friend living with us and wants to get a home based call center job using this new iMac. Prospective employer sent instructions on how to test pc evaluation where I was to burn an iso app to a cd then reboot the computer using the cd app. I have not been successful - I poked around and found that an iMac should boot from a cd holding the "c" key down - did not work or holding down the option key and then choosing the cd disk option - did not work either. Could this be that the actual app sent is not Mac compatible? Is there something else I could do? Thank you so much for any guidance - I am beyond a newbie - its not even my iMac!!! just trying to help a jobless friend!!!