Sorry for the delay... I do have a retail copy of OS X Tiger. My problem is that I can not boot off of it. I used the optical cdrom drive that came with it and when that did not work I tried a dvd+rw and a dvd-rom drive. The disk still will not boot. And to add, I held down the "C", I tried several of the switches, I even did the Pram thingy and It still did not. Someone please tell me if I am over looking something because I still get the OS X Tiger intro with the "Welcome" in different languages, the "Getting Started with OS X Tiger" intro, it gets to the "Select a Keyboard" and freezes when it reached the part where I have to choose my country.