How To Find Your MAC Address
To find out the MAC address of network devices installed on your Macintosh, follow these steps:
1. Open the Apple menu and select System Preferences then click on Network.
2. Depending on how you connect to Internet or local area network, double-click either on “AirPort" or “Built-in Ethernet".
3. For Ethernet, click on “Advanced", and then select Ethernet (from the tabs). At the top, the MAC address of your Ethernet adapter will be shown.
4. For AirPort, click on Advanced and your MAC address will be shown at the bottom of the page.
You can also find MAC address by going to TCP/IP Control Panel. If your computer is running Open Transport, your MAC address will be shown under the “User Mode/Advanced" or “Info" screens. If the computer is running MacTCP, the MAC address is displayed under the Ethernet icon.