Open up System Preferences by selecting the Apple logo and then "System Preferences"
OSX System Preferences

Select the Network preference pane.
OSX Network Pane

Select your Ethernet adapter.
OSX Ethernet

Click on the Configure IPv4 pulldown menu and select Manually.
OSX Manual TCP

Enter in the IP Address information given to you by Omosft. If you have forgotten these settings, call us at (530)758-0119.
The Router field is for the default gateway.
Use 168.150.253.2 and 168.150.253.1 as your DNS servers.
OSX TCP Settings