MAC OSX 10.5-10.6 DHCP Setup
Connecting via DHCP is the default state for most computers. You may only need to plug the computer into your dsl modem to get running. If you are switching from a different kind of connection or another provider please follow the instructions below.
Click on the apple menu and open System Preferences.
Select the Network preference pane.
Select your Ethernet adapter.
Set the "Configure:" drop down menu to "Using DHCP".
Click apply and you are finished!