Mac
OS - Create Connection
Setting up an Internet
connection in Mac OS X is simple. Click on the apple in
the top left corner of your screen. Select System Preferences.

Under the section
Internet & Network, select Network.

Select the PPP tab,

Select the modem
tab,

That's it your ready
to go.
You
can connect a few different ways. On the toolbar at the
top of the screen, you'll see a phone.
Click on the Phone icon, select Connect.

OR
Another way to connect is through the Internet Connection.
This is the yellow book in Mac's 'Dock' as seen below.

Click the Yellow Book to open it. A screen like
the one below appears. Click Connect.

After
connecting, open your browser to surf the Internet.