The bottom port (Intel i210) is supposed to be natively supported by OSX. However, when I booted into OSX without any network drivers from Multibeast, neither port shows up in the Network Prefs.
After installing hnak's network driver, I got the TOP ethernet port working properly (Intel i217-V chip), but the bottom one is still unresponsive (Intel i210) which is unusual because its supposed to be natively supported.
FYI the lights on both ports behave the same when the ethernet cord is plugged in: Left light is solid orange, right light is blinking yellow.