http://www.macupdate.com/download/26167/changemac1.6.zip
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ChangeMAC is an application to spoof your Ethernet or Airport mac address. It will also generate a random address for you. Admin password required to change mac addresses.Just copy to your applications folder to install.
Limitations
-only works for the primary ethernet address
-does not work with Mac Pro airport
Released under GPL. The scripts used to get and set the mac address, for both the Airport and Ethernet interfaces, were modified from one written by Fouad Sethna.
What's New
Version 1.6: Release notes were unavailable when this listing was updated.
Requirements
Mac OS X 10.4 or later
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