Astrolab 1.0181 for Mac is available as a free download on our application library. Our built-in antivirus checked this Mac download and rated it as 100% safe. The application is included in Education Tools. This free Mac app was originally designed by The Alchymist's Laboratory.
From the developer:
COS - Astrolab is an open source tool to assist you with the study of Astronomy, Astrophysics, and Cosmology.
You may want to check out more software for Mac, such as Strimko, which might be similar to Astrolab.