At Rill & Decker Architects we run ArchiCAD on Mac OS X. If you work at Rill & Decker, this is your stuff. If you don't, but you work in ArchiCAD, you may find something interesting. Anybody else, I don't know.
All the posts in the Objects category have the location given at the beginning, for your convenience. Unless noted otherwise, the location is the R&D Library, Master LIB 8 : 1 Rill & Decker LIB8.