i install the 30 dollar snow leopard and it spits it out in a minute after reading and then i insert it restart computer and hold down option key and it does the same thing. nothing shows up on my macbook screen (white 13.3 inch 2.0ghz) i am running tiger and i know that the 30 dollar snow leopard is not intended for it but it can easliy be done http://www.youtube.com/watch?v=loFUyDjCbK8