http://forums.sketchucation.com/viewtopic.php?f=15&t=27784&p=241632

Would be happy to do it but you could just down load the trial of Max and save it out..

If you can't get that to work you could try opening the .skp in DoubleCAD XT (free), and save it as a .dwg. If your 2D views are saved as scenes in the .skp DoubleCAD will create a paper space with viewport for each scene preserving layer visibility settings, view, and 2D or perspective camera properties. It might accelerate getting your design into AutoCAD.

-- William

 thank you very much Jeff Hammond, had the problem of visualization on OS X 10.5.6, this would help much. 