Launch Terminal from the Applications:Utilities folder. Choose Ethernet from the list of interfaces on the left and click the Advanced button.Ĭhoose the Hardware tab under which you will see the MAC address of your ethernet card. Press Cancel to return to the Network menu. Select System Preferences from the Apple menu at the top left of your screen.Ĭlick Network from the System Preferences menu.Ĭhoose Wi-Fi from the list of interfaces on the left and click the Advanced button.Ĭhoose the Hardware tab under which you will see the MAC address of your wireless card. These are instructions on how to find the MAC address of your ethernet or wireless networking card in Mac OS X.