I'm not able to export 3D dxf or dwg files without receiving an error message. Also the export takes a really long time. I have tried a variety of models from very simple to complex. The end use if the exports is to import into Archicad 16. I did import files that were created with the error and they imported, but I was not able to resize them or do anything except move them. Before Mavericks, the export function was fast and accurate.