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

Select the Network preference pane.

Click on the + to add a new connection.

On the Interface pulldown select PPPoE.

Enter in "Omsoft" for the service name. And click on Create.

Leave the PPPoE Service name blank.
Enter your account name which was given to you by Omsoft, if you are unsure of your account name call us at (530)753-0119.
Type in your password and select the Remember this password check box.
Check the Show PPPoE status in the menu bar check box, and then click Advanced...

Once in Advanced, select the PPP tab. Make sure that Connect Automatically when needed and Send PPP echo packets are the only options selected. Click the OK then Apply buttons.

Now you can exit out of System Preferences and initiate the PPPoE connection by clicking the PPP icon in the menu bar and selecting Omsoft.