Okay so I know this will sound kinda awkward but I managed to install OS X Mountain Lion on the following configuration: i7 3770, H77 DS3H Gigabyte Motherboard, Nvidia GTX 560 TI. I didn't use onboard LAN, I used tp link 3269 by Gigabit which has native support in Mountain Lion. Now I just want to add PCIRootUID=0 in the extra folder on my mac partition problem is that I can't see my mac partition in Finder and I can't reach the extra folder. I know this sounds funny, but I'm not very familiar with Mountain Lion interface I just used Snow Leopard and older versions where it was so easy to find the boot plist and edit it. How can I find my OS X partition so I can edit the boot plist?