StochSS works on Mac OS X and Linux platforms.
An introduction to StochSS can be found on the Documentation page
To receive updates on new feature releases and bugfixes, sign up for the user Google group: firstname.lastname@example.org. There, you can also submit feature requests, support questions, as well as interact with other users.
If the Mac OS X version fails and reports problems with Python versions or packages (this can happen with custom Enthought or Anaconda Python installations), try using the experimental StochSS package here: Download.