How can I test my Wifi security using a Mac Powerbook? I am not very Mac savvy, but for right now my Mac is my only laptop. It is a little bit older, I have OSX 10.4.11, with an Intel core 2 duo and Airport Extreme (1.4.4 firmware). My network is WPA encrypted. My only other wifi cards are internal and I am having trouble finding a working wifi crack for mac. Do I have to buy an external wifi adapter because of my airport card?