Well I am typing this from my Macbook using my 6800 as a modem. It can be done. Let me find the video on Google that goes through a sort of step by step for ya.
here ya go.
http://www.youtube.com/watch?v=r58Eqrvm3Wo
Click Here. Just follow step by step, and if you have any questions, either reply to this thread or PM me.