How to Spoof Your Airport MAC Address in Snow Leopard

How to Spoof Your Airport MAC Address in Snow Leopard

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These are instructions on how to change or spoof your wireless adapter's MAC address in Snow Leopard.

A Media Access Control address (MAC address) is a unique identifier assigned to most network adapters or network interface cards.

Please note these instructions worked for us with a MacBook Pro running Snow Leopard 10.6.2. We cannot confirm that they will work for other operating systems or devices.

Step One
Launch Terminal from your Applications:Utilities folder.
How to Spoof Your Airport MAC Address in Snow Leopard

Step Two
Enter ifconfig en1 | grep ether to find the current MAC address for your wireless network adapter.
How to Spoof Your Airport MAC Address in Snow Leopard

Step Three
Make sure your Airport is turned on and input the following into the Terminal window to disassociate from all networks.

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -z
How to Spoof Your Airport MAC Address in Snow Leopard

When asked input your administrative password, do so.
How to Spoof Your Airport MAC Address in Snow Leopard

Step Four
Input the following command to change your MAC address

sudo ifconfig en1 ether 00:11:22:33:44:55

Replace 00:11:22:33:44:55 with an address of your choice.
How to Spoof Your Airport MAC Address in Snow Leopard

Step Five
To verify the change has completed successfully input ifconfig en1 | grep ether into the Terminal window.
How to Spoof Your Airport MAC Address in Snow Leopard

How to Spoof Your Airport MAC Address in Snow Leopard

*Please note that restarting your computer will revert the MAC address to its default value.

Florent - April 4, 2010 at 12:06pm
It works fine under 10.6.3 By the way, the command \" sudo ifconfig en1 down \" + \" sudo ifconfig en1 ether xx:xx:xx:xx:xx:xx \" now only works under 10.6.2. If you upgrade your MacOS X to 10.6.3 you\'ll get this message : ioctl (SIOCAIFADDR) Device power is off Of course, if you tried with airport switched up, you won\'t get this but the command won\'t have any effect. I\'ve reported this issue.
calsim - February 14, 2011 at 7:12pm
It seems to work fine under Mac OSX 10.6.6
onu - February 14, 2010 at 4:37pm
and \"airport express\" ?? how to spoof adress? pls
EvilPenguin - February 13, 2010 at 2:23am
Here is a binary for this: http://nakedproductions.us/Harddrive/MACaddy
Macslut - February 13, 2010 at 12:42am
This doesn\'t really work. This used to work in 10.5.x, but they fixed/broke this in 10.6.x. What happens is it all appears to work, just as your screenshots show, but...you\'ll be unable to log into a wifi network that requires a password. If you go to Preferences->Network, you\'ll see if you click on your Airport icon and the Advanced button that it will show your old MAC address. Somehow the MAC address is being changed only in one of two locations. It\'s the changing of the second location that apparently nobody has been able to figure out and which would allow us to change our MAC address for any practical use. If anyone has any ideas, please post and I\'ll test.
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