Try this,work for me on 10.7x and 10.8x-RTL8101E/RTL8102EVendor: 10EC and Device 813foSorry t
Sorry for the necrothread.
I have the same device ID and have just tried this. It yields the same result as any other KEXT I've tried, including the official Realtek installer as found here. Upon installation and a reboot, OS X always show that the ethernet is connected with a self-assigned address... this is without the LAN cable plugged in!
I've also already tried this other thread, no joy so far.
This is a very strange problem. Does anybody have a viable solution?