ACCURENDER nXt !!!
The new generation of AccuRender is called nXt. It is a rendering plugin for AutoCAD, Revit, SketchUp or Rhino.
The software will be commercial, but you can currently subscribe to test a pre-release version. This is free.
You can indicate if you are a Mac user, but the software is currently targeting Windows applications mostly. But when you know that Rhino is being ported to OSX, AccuRender might follow.
Maria