Nothing like feeling dumb all over again. Trying to do some documentation using Sphinx as the language and Github as a repository. There are lots of dependencies, so here's a cookbook:

1. Get a http://github.com logon
2. Download Github for the Mac
3. Download repositories from there, you will see your repository in your home directory.
4. While the latest version of Python is 3.3, as Ludwig says, no one uses it, so the current Python 2.7 that comes with Mountain Lion is fine
5. Finally install Sphinx if you need to do documentation via the Terminal command, "sudo easy_install -U Sphinx"