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Editorial Team
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Asked: 2026-05-20T10:34:20+00:00

i am using visual studio 2010 and Windows XP on a macbook through bootcamp.

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i am using visual studio 2010 and Windows XP on a macbook through bootcamp.

I realized that i could not change the MAC address through the registry(through RegSetValueEx), if my adapter selected is the one integrated to the laptop, Eg: Broadcom wireless adapter for macbook.However certain values like AA-BB-CC-DD-EE-FF worked.

However if i plug in a wireless usb network adapter it worked flawlessly.My guess is that it is not my code that is having the problem,since i tried other downloaded from the internet and it is the same thing. Can anyone explained why this is happening?

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  1. Editorial Team

    Thanks to your answer I managed to solve the problem. AA-BB-CC-DD-EE-FF-GG works because of a big luck. The idea is that Windows 7 imposes some restrictions, as you can se on the Wikipedia page: http://en.wikipedia.org/wiki/MAC_spoofing . So, “Under Windows 7, the possible range of spoofed addresses that can be set is limited for wireless and wired network adapters. To be used by Windows 7, a spoofed MAC address should have 0 as a least significant bit (unicast) and 1 as a second least significant bit (locally administered) in the second nibble. Thus possible values for the second nibble are limited to 2, 6, A and E.” The two specified bits, as I could see from the page http://en.wikipedia.org/wiki/MAC_address correspond to the second character of the MAC address, thus, any address that have the second character 2,6,A, or E works. No other one could.

    T

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