well we tried to connect the mac to the box thing but the little lights arent turning on and then i tryed another wire but it still didnt work i think its the box that dosent work i dont have any idea PLZ help!!!
(its a desktop)
OK. If your Ethernet uses DHCP, (which most do), the Internet connection should be established automatically. Simply plug the Ethernet cable in, and wait for a few seconds. Open up Safari and/or Network Utility and check to see if you're connected. If not, you may need to go to the Network preference pane in System Preferences and key in your Internet settings manually, if your connection is not automatically established.
The very last possibility is that your hardware be may damaged, and you may need to have it serviced.