Hello, my Mac Pro won't boot up-- it gets to the Apple icon (grey background, spinning gear) and then the kernel panic message pops up: "You need to restart your computer...". I successfuly used Target Disk Mode (TDM) to run Disk Utility from another Mac Pro on the boot drive of the problem Mac. Disk Utility repaired a few minor issues and gave it a clean bill of health... but it still won't boot up. I think I will clone the startup disk but does this sound like corrupt operating system or?? Any other diagnostics I can run? Help please, thanks!!