dRofus is a native Windows application and cannot run directly on the Mac OS X. It is possible to run dRofus on a Mac that has Windows installed via Bootcamp, or a virtualization solution e.g. Parallels. Note that third party tools such as Revit, ArchiCAD and Excel also needs to be installed in the Windows environment for the dRofus add-on and Excel exports to work. PDF reports are generated on the dRofus server and displayed through your default internet browser, e.g. Safari.