As of JavaFX 2.0 build 07 for Mac, 3D rendering is not yet supported. This can be seen by running the Ensemble demo and trying out samples like "Cube" or "Audio Visualizer" which display a message saying "A modern 3D capable platform is needed to run this sample").

Actually, 3D does work to a limited extend which can be shown by updating the code of this sample:
http://fxexperience.com/2011/05/simple-3d-cubes-in-javafx-2-0/

If you fix the compilation errors (import statement changes, RectangleBuilder API, ...) this sample runs fine but without any perspective - the rendered cubes rotate fine but look flat.