KisMAC
KisMAC is a wireless network discovery tool for Mac OS X.  It has a wide range of features, similar to those of Kismet (its Linux/BSD namesake).  The program is geared toward network security professionals, and is not as novice-friendly as similar applications. Distributed under the GNU General Public License, KisMAC is free software.

KisMAC will scan for networks passively on supported cards - including Apple's AirPort, and AirPort Extreme, and many third-party cards, and actively on any card supported by Mac OS X itself.

Cracking of WEP and WPA keys, both by brute force, and exploiting flaws such as weak scheduling and badly generated keys is supported when a card capable of monitor mode is used, and packet reinjection can be done with a supported card (Prism2 and some Ralink cards).  GPS mapping can be performed when an NMEA compatible GPS receiver is attached.

Kismac2 is a fork of the original software with a new GUI, new features and that works for OS X 10.7 - 10.10, 64-bit only. It is no longer maintained.

Data can also be saved in pcap format and loaded into programs such as Wireshark.

KisMAC Features
 Reveals hidden / cloaked / closed SSIDs
 Shows logged in clients (with MAC Addresses, IP addresses and signal strengths)
 Mapping and GPS support
 Can draw area maps of network coverage
 PCAP import and export
 Support for 802.11b/g
 Different attacks against encrypted networks
 Deauthentication attacks
 AppleScript-able
 Kismet drone support (capture from a Kismet drone)

KisMAC and Germany
The project was created and led by Michael Rossberg until July 27, 2007, when he removed himself from the project due to changes in German law (specifically, StGB Section 202c) that "prohibits the production and distribution of security software".  On this date, project lead was passed on to Geoffrey Kruse, maintainer of KisMAC since 2003, and
active developer since 2001.  KisMAC is no longer being actively being developed.  Primary development, and the relocated KisMAC web site were offline as of September 2016. As of August 6, 2007, the former homepage now denounces the new German law.

KisMac2 was project to continue development but is no longer maintained as well.

See also

 Aircrack-ng
 iStumbler
 Kismet
 Netspot
 WiFi Explorer

References

External links
Binaries of latest versions
Former homepage 
KisMAC Svn
KisMAC2, a currently maintained fork of the original project

Free software programmed in Objective-C
Wireless networking
MacOS-only free software
MacOS network-related software
Network analyzers