Hello all, I recently did buy a beautiful Apple Macbook Pro A1286, early in 2011 bought 15 inch i7, 8GB RAM and 1000GB. However, Windows 10 was installed on it, so I looked at the serial online and purchased snow leopard (Mac OS X 10.6). I did the installation from the CD, however, I can make the choice to start from the CD, but he always hangs at the '' white screen with apple logos. Even with Mac OS X 10.6 I created a USB boot disk, but it recognizes the USB sticks and stucks again on the same screen, white screen with apple logo. Even with the recovery of the hard drive I come to the same problem. The funny thing is, there is Windows 10 installed from the previous owner and it just works. Does anyone have a solution? I am now a making a boot USB with OS X 10.8 (Mountain Lion). I've even done vram reset, but without success. Is the software (Snow Leopard) maybe too old for my macbook pro?