Apple iPhone, iPad or iPod:

To locate the MAC Address of your iPad, iPhone or iPod Touch, follow these steps:

1. Tap Settings
2. Select General
3. Then Select About
4. The Mac Address is listed as WiFi Address

Apple TV:

you can find the MAC address using the following steps: 

Software version 1.0: Settings > About 

Software version 2.0: Settings > General > About The Apple TV 

Please note: The MAC address'/Network IDs (both Ethernet and wireless) can also be found on the UPC label on the Apple TV box. This is the same label that lists the serial number for your Apple TV.

To locate the MAC Address of your Mac Book running OS X 10.4 or earlier, follow these steps:

1. Open System Preferences (from the icon in the Dock or from the Apple menu).
2. Select Network.
3. Select AirPort from the Show drop-down menu. The MAC address is listed as AirPort ID.

To locate the MAC Address of your Mac Book running Leopard (10.5) or Snow Leopard (10.6), follow these steps:

1. Open System Preferences (from the icon in the Dock or from the Apple menu).
2. Select Network.
3. Select AirPort from the left pane and then click the Advanced button.
4. The MAC address is listed as AirPort ID.

To locate the MAC Address of your Mac Book running Lion or Mountain Lion (10.7), follow these steps:

1. Open System Preferences (from the icon in the Dock or from the Apple menu).
2. Select Network.
3. Select AirPort from the left pane and then click the Advanced button.
4. The MAC address is listed as WiFi Address.