You should be able to burn an iso file from a MAC, although I don't know the proper tools or exact options. You didn't give us much to go on, but I suspect the most likely problem is that is was burned improperly. See answer #1 for details, you'll have to either apply the key information to the MAC world yourself or move the ISO to a PC and do a burn there. Please feel free to update the FAQ if you determine the proper way to burn an ISO on a MAC.