Re:

I want to have one computer just do mac authentication, instead of matching username and password. Can I just add this mac address to the mysql database.

Yes, as User-Name with Auth-Type Accept.

I am running chillispot also, I believe all I have to do is uncomment a line in the chilli.conf file to have it do mac authentication. Would this be the right way to do this?

Probably. That's the question for ChilliSpot list. Ivan Kalik Kalik Informatika ISP