I updated from the App Store. When it restarted it when to OS X Default Graphics Drivers but NVidia notified me that a new driver was available and I installed and works perfect. With audio, I have no problems off HDMI audio to TV. Don't know about sound from the back(green) plug but I have no sound from headset port but its not a big deal to me since I don't use it. Don't know about microphone either.
Update: I have tested the front Headphone and the rear (green) audio and both work. I also tested out the ethernet and it is also working. The only thing I don't know if it works is the Microphone. Don't really know how to test it.