If you're talking about wireless connectivity, just click on the wifi icon at the top of your mac and choose your ssid.
If you're talking about connecting to an AP via console cable, (which makes more sense) I'd recommend using the Dynex USB-to-Serial adapter from Best Buy. They're a little more expensive, but you don't have to mess with drivers. It works right out of the box. Use ZTerm as a terminal emulator. It's very simple to configure and works like a charm.