I have SBC Yahoo DSL and it comes with and included Efficient Networks Speadstream modem (of varying models, I have the 5100). It is obviously not top of the line since it is included in a “starter pack” but it has gotten the job done very well with me and my Linksys router :D . I don’t see why you would have any problem with it either.
It has a 4 total ports etc. on the back: DSL-in (RJ-11) Ethernet out, D/C in, and a power switch. It is fully compatible with my LindowsOS Developer Edition 4.5 and Windows and I suspect Mac ( I’m a Windows-Linux user :wink: ). It should be relatively cheap to buy street price and it gets everything done well. Hope this helped you out. ~God Bless