Reboot the Mac and hold down the Command+R keys until you see the loading screen to signify you. As you would imagine, this created an Internet panic attack, with people reading the statement to mean that CS3 apps would not run on Snow Leopard. Get all the details on the new Mac OS X. When you get a Kernel Panic on OS X, the screen darkens and you see a multilingual message that tells you to restart your computer. So, this made me wonder – what the heck causes this? Much like a Blue Screen of Death on Windows, this could be indicative of a software problem, a hardware problem, or a conflict of hardware and software.