So I followed Spaceinvadorone's guide, but the mac doesn't have any internet access. I'm using an Asus Rampage IV Black Edition board which has Intel(R) 82579V Gigabit Network Connection. I was able to download open core during the guide.
Also, I'm going to pass through Sapphire HD 7970, is there anything I need to do before I change the gpu from VNC to the graphics card? While typing this up, I figured I would check if the card is available. It is not showing up as an option under gpu. However, it does appear to be in the PCI devices list.