How do I find my MAC Address or IP address?
Finding the IP and MAC address for the wireless adapter
Go to the Apple menu and click System Preferences.
This brings up System Preferences, as shown below. Click on Network.
3. Select AirPort and note the IP address on the right panel, as shown below. Click on Advanced... to bring up more information about the AirPort connection.
4. Make sure the AirPort tab is selected, as shown below. Note the AirPort ID. This is the MAC address for your computer's AirPort card.