When I stick the Leopard disk in my computer, it pops up and I click install Mac OS X. Then it prompts me to restart. I click restart. Then it reboots and it white screens with the grey apple and the circle thing turning over and over again ( not the beach ball).... forever. It never gets off of the white screen. I can't even get to the installation page! Don't worry my computer is a brand new intel imac so there should be no problems. Help? Please?