[_delirium]

Huh, I hadn't seen the Thunderbolt ones. The USB ones are notorious for not really working (they seem to have driver issues). Hopefully the Thunderbolt ones are better?

[TazeTSchnitzel]

Thunderbolt is just PCIe under the hood, so it would hopefully work as well as a PCIe Gigabit Ethernet one.

Although the fact it's Apple-made is probably more important, since they'll have made sure it works.

[acdha]

I'd second the thunderbolt recommendation but I would question the concerns about USB – until upgrading to Thunderbolt, I had no problems with daily heavy usage (along with several coworkers). The main drawback is that the USB devices can't go over 100Mb.

[jmnicolas]

I don't know for MACs but for 2 years at work I used a Windows laptop with a USB to Ethernet adapter and it ran absolutely fine.