How do I find out what wireless card my Mac has?
 -&gt; About This Mac -&gt; More Info... -&gt; System Report... 


Under the Network Heading, click Wi-Fi, and find Interfaces: on the right side of the window.  You will find your card type, firmware version, MAC address, etc.



The route for older MacBook Pro running OSX 10.5, 10.6...

 -&gt; About This Mac -&gt; More Info... -&gt; Under "Network" choose "Airport"


Scroll down to:
"Interfaces"
"en1"
"Card Type"