Stellarium is free GPL software which renders realistic skies in real time with openGL. It is available for Linux/Unix, Windows and Mac OS X. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope. Stellarium is also used in planetariums.
Stellarium’s site states:
We’re looking for someone to create a Mac OS X package for version 0.7.1. We would be very grateful if you can find some time to help us out. Contact us, and we’ll make the package available to all Mac users.
More info here.
Mac OS X package 0.7.0 available soon, in the meantime, Mac OS X binary package 0.6.2 info and download link here.
MacDailyNews Take: If any MDN readers can help them or know of someone who can help them create a Mac OS X package for version 0.7.1, please contact the Stellarium folks.