Geomview 1.9 should – in principle – compile and run on any fairly recent Unix-like operating system. Specifically, it runs on Linux and on Cygwin (Cygwin emulates a SystemV Unix-like environment under Microsoft Windows). Unluckily Geomview compiles with MacOS X (Darwin), but seemingly communicating with Geomview by means of pipes and sockets cause segmentation faults. Feel free to fix that! See Contributing, for details.