OpenCOR can be used on the below versions of Windows, Linux and OS X.
OpenCOR is supported on Windows 7 (32-bit and 64-bit) and Windows 8 (32-bit and 64-bit), but it should also work on Windows XP SP2 and Windows Vista.
OpenCOR is supported on Ubuntu 12.04 LTS (Precise Pangolin; 32-bit and 64-bit) and 12.10 (Quantal Quetzal; 32-bit and 64-bit). However, it might also work with some other versions of Ubuntu and some other Linux distributions, though additional system libraries might be needed for the latter.
OpenCOR is supported on OS X 10.8 (Mountain Lion).