ArchiCAD 16 Hotfix-2 package (build 3270) was released today. You can read about all the details and download the hotfix (if your ArchiCAD isn’t set to automatically notify you) here. I know this hotfix solves an OpenGL anti-aliasing issue with ArchiCAD 16 and Mac OS X 10.8. Additionally it also contains fixes for several Energy Evaluation problems, IFC bugs and improves display quality on Mac computers with HiDPI display. Remember to update everyone using Teamwork 2 (including the BIM Server) at the same time.

For more details about the installation/update process, check the link I referenced above.