Changing (spoofing) my MAC address?

Does anybody know how to do this in Snow Leopard?
I can only find info on how to spoof earlier versions online. Does anyone know how to spoof the MAC address on a Mac running OS X 10.6?
Thanks

This is how it works on my machine. Note the change of MAC address and because I am using DHCP it changes the IP address also. I have changed the MAC address in this info so as not to use my real one. So I am now running on the new MAC address. It will revert to the original on reboot, you would need a script to change it every time you restart the computer. Not sure why but this does not work on the airport.
This is a nice exercise but why do you would you want to change it?
regards
Last login: Tue Oct 27 13:42:53 on console
Computer-name-iMac:~ username$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1492
inet 192.168.0.2 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1e:c2:aa:bb:06
< cut>
Computer-name-iMac:~ username$ sudo ifconfig en0 lladdr 00:1e:c2:aa:bb:07
Computer-name-iMac:~ username$ sudo ifconfig en0 down
Computer-name-iMac:~ username$ sudo ifconfig en0 up
Computer-name-iMac:~ username$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1492
inet 192.168.0.3 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1e:c2:aa:bb:07
media: 100baseTX <full-duplex,flow-control> status: active
<cut>
Computer-name-iMac:~ username$

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http://osxdaily.com/2008/01/17/how-to-spoof-your-mac-address-in-mac-os-x/

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Hi
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Hello,
I am attempting to change my wireless MAC address. Here's what I've done, yet nothing changes (I am attmepting to change my Wifi address from 00:1c:b3:70:e9:f2 to a1:b2:c3:d4:e5:f6):
ryans-imac:~ Ryan$ ifconfig en1
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21c:b3ff:fe70:e9f2%en1 prefixlen 64 scopeid 0x6
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media: autoselect status: active
supported media: autoselect
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Password:
ryans-imac:~ Ryan$
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Thanks.

etresoft wrote:
What you want is the "airport" program, conveniently located at /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resourc es/airport
It will allow you to change your MAC address. Prior to 10.5, the airport command would not change the MAC address for the Airport card, but it works now.
Here is the airport help
./airport AirPort v.522.4 (522.4.0)
Supported arguments:
-z --disassociate Disassociate from any network
-i[<arg>] --ibss=[<arg>] Create IBSS
-x --xml Print info as XML
-s[<arg>] --scan=[<arg>] Perform a wireless broadcast scan.
Will perform a directed scan if the optional <arg> is provided
-r<arg> --repeats=<arg> Repeat the command the specified number of times
-A[<arg>] --associate=[<arg>] Associate to network.
Will prompt for network name if arg is not specified
and if necessary, for a password if the network is using WEP or WPA.
The following additional arguments may be specified with this command:
--bssid=<arg> Specify BSSID to associate with
--password=<arg> Specify a WEP key or WPA password
-I --getinfo Print current wireless status, e.g. signal info, BSSID, port type etc.
-P<arg> --psk=<arg> Create PSK from specified pass phrase and SSID.
The following additional arguments must be specified with this command:
--ssid=<arg> Specify SSID when creating a PSK
-c[<arg>] --channel=[<arg>] Set arbitrary channel on the card
-h --help Show this help
It's not clear to me which command if any will allow a MAC change

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Changing (spoofing) my MAC address?

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