Hello Mac OS X users, I have updated the Demeter port in Macports on OS X to version 0.9.18.3 so that artemis and hephaestus now work! I also added symlinks to atoms and datoms. Thanks to Bruce Ravel for providing some quick fixes! If you already have the demeter port installed, this is how to update to the latest version. 1. Launch Terminal 2. Type: sudo port selfupdate 3. Type: sudo port upgrade outdated If you are installing for the first time, please see Bruce’s instructions on the wiki [1]. Cheers! Frank [1] http://bruceravel.github.io/demeter/#mac