Download and install StuffIt Expander 9.0. You can search for it @ versiontracker.com
The .bin is like a zip file, so you need something to extract it with (in this case StuffIt Expander 9.0). After you extract it you may get a .dmg, or the installer, in which case double clicking on them will carry you on.
Hope it helps you, and good luck with your mac experience
