- In the XMB™ home menu, go to
(Settings) > 
(System Settings) and press the 
button. - Scroll until you see [System Information] and press the button.
You will see your MACAddress listed. Be sure to write down the entire string of letters and numbers, including the colons ":" in between.
Here is a picture of what the screen with the Mac address should look like.
Below is a link on how to connect your Playstation 3 to wireless and wired internet.
http://playstation.custhelp.com/app/answers/detail/a_id/977/session/L3NpZC9pS1FPcWRVag%3D%3D/sno/0
