Me in IT UNIX/Linux consultancy

If you are lucky, you own an Intel MacBook, or even an Intel MacBook Pro. The only disadvantage is that it's difficult to scan and recover passwords for wireless networks secured by WEP using KisMac. You would need extra hardware to do that. I bought a D-Link DWL-G122 H/W Ver: C1 F/W Ver: 3.10 from Expansys in The Netherlands. (It actually came from France.) Costs around € 30,-. Here is how to use it in KisMac.

1. Don't install any drivers! You will only be using this device in KisMac which provides its own drivers. If you did install it, see at the bottom of this article how to uninstall it.
2. Download KisMac, the "USB-Drivers" version.
3. Start KisMac and go to Preferences.
4. Remove all Capture devices and add "USB device, passive mode". Enable all channels. Enable "use as primary device".
5. Click "Start Scan". This will scan your area for available networks.
6. Take note of the channel ("Ch", second column) for the network you would like to focus on. KisMac should be configured to only check that channel, so deselect all, except for the channel your are focused on.
7. Restart the scan. You will collect packets much faster when using a single channel.

Play with all the other settings and have fun recovering your WEP password.

Uninstalling the D-Link DWL-G122 driver

I know these are not the official steps to uninstall the driver, but following these steps made KisMac work for me again. Be aware, these are the steps that I have followed, they might not work for you, or even break things. Know what you are doing!

• rm -Rf /System/Library/StartupItems/DWLG122
• rm -Rf /System/Library/Extensions/RT2500USBWirelessDriver.kext /System/Library/Extensions/RT73USBWirelessDriver.kext
• rm -Rf /Library/Receipts/D-Link\ DWL-G122.pkg/
• rm -Rf /Users/*/Library/PreferencePanes/DWL-G122WirelessUtility.prefPane
• reboot