Mac OS X and Airport wireless tools

• KisMAC (KisMAC NG) is a wireless discovery tool for Mac OS X that has passive scanning modes, support for WEP attacks, and scanning combined with GPS devices. KisMAC supports PCMCIA cards with Orinoco, PrismII, Cisco Aironet, Atheros and PrismGT. USB devices with Intersil Prism2, Ralink rt2570 and rt73, and Realtek rtl8187 chipsets have more limited support. It’s free and open source.
• Kismet is a wireless discovery tool that has limited support for Mac OS X. Kismet is available for Macports and Fink.
• iStumbler is a Mac OS X wireless discovery tool similar to NetStumbler that will find AirPort networks, Bluetooth devices, Bonjour services, and GPS locations. It’s free.
• AirPortClown is a tool that allows you to change/spoof your AirPort MAC addresses on Mac OS X 10.6 Snow Leopard. It does not support wired Ethernet interfaces. It’s free and open source.
• ChangeMAC is a utility to let you change/spoof your hardware Ethernet MAC or Airport MAC address. It will only change the primary Ethernet interface and will not work with Mac Pro AirPort interface. It’s free and open source. It works with Snow Leopard.
• Cocoa Packet Analyzer is a network sniffer/protocol analyzer for Mac OS X. It supports PCAP files and supports third-party protocol extensions. It’s free, a native OS X application, and has 64 bit support under Snow Leopard.
• Ralink chipsets are used in many inexpesive WiFi adaptors. In addition to Windows and Linux, Ralink also makes Mac OS X Wifi Drivers. Here is a large list of Ralink chipsets based wireless devices