How to find mac address with 10.7.2 on macbook air

my dorm doesnt have wifi we r required to sumit our mac address in order to connect to use internet with internet cable
i have an air with 10.7.2 and bought a ethernet adapter still can find my mac address.........plz help me

Use the System Information. To get to this, go to the Apple menu, select About this Mac, and click the System Report button.
In the left column go to Network and select Wifi. Under interfaces select en1 and look for the MAC address.
Alternatively you can use System Preferences > Network > Wi-Fi > Advanced button > Hardware tab > MAC address.
Best of luck.

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