Below you'll find software, both packaged and otherwise, freely available for download.
Note: The software provided by this site comes without any warranty, expressed or implied, and may or may not work as advertised. It is provided as a convenience for users, and not in any official capacity.
sudo port mpkg dia and so should contain all the necessary prerequisites for the software. It installs under /opt/local and must be run from within X11.app as /opt/local/bin/dia./ (it'll actually end up in /opt/shibboleth-sp) and then follow the instructions given on the Shibboleth configuration page. Note: This does not come with any support or warrantability for any particular purpose. We're providing this here as a convenience since building Shibboleth can be a time-consuming and complicated process. The bytes herein work for us, but if it breaks you get to keep both the pieces.