I recently bought a mid-2012 Macbook Pro 9,2 which came pre-installed with OSX 10.9 Mavericks (it's further been upgraded to 10.9.4), but I need to run some software which only runs under Snow Leopard. I was hoping I could just pop in the 10.6 installation DVD (boxed DVD with OSX 10.6.3) to boot from, then run the software, but no go. I am able to chose the OSX 10.6 DVD from the "Startup disk" system preference, but after restarting all I get is the black Apple logo in the middle of the screen which just stays there. After several minutes of no progress I've had to press and hold down the power button in order to move on. So what's the deal? Isn't it possible to run 10.6 on my MacBook Pro or am I doing something wrong?