Hey all here is my dilemma, I have a MBP 15' 2.66GHZ i7 8GB Ram etc... Few days ago my internal drive would not boot; So I went to the apple store and they 'determined' that it was the logic board through a very sketchy process of elimination. In the end my logic board was replaced. On the next day I decide to finally set up boot camp (Big Mistake). Everything goes fine up until I decide to download - Boot Camp Software Update 3.2 for Windows 64 bit. After installation I was prompted to restart my computer after which it booted into Mac and Kernel panic ensued along with the gray screen. Windows partition works fine, I was unable to boot from CD, tried PRAM reset, Could not safe boot. Target Disk mode formatting the hard disk and then reinstalling Mac OS was successful in reinstalling the OS, but it still does not boot. Now I am stuck with Windows 7 working and Mac not booting stuck at apple no spinning wheel. Please help, I really do not know what do to.