SkySafari 4 Pro for Mac OS X

Please Note: SkySafari is now owned and supported by Simulation Curriculum Corporation. This page contains legacy information for owners of older versions of the app. For the latest information on SkySafari for Mac OS X, go to

Now rebuilt for Mac OS X, SkySafari 4 Pro has the largest database of any astronomy app, period. It contains everything in SkySafari 4 Plus, and adds over 1.2 GB of data, including 25 million stars from both Hubble Guide Star catalogs, over 740,000 galaxies down to 18th magnitude, and over 630,000 solar system objects - including every comet and asteroid ever discovered. It simulates the view from anywhere in the solar system - or beyond it - at up to a million years in the past or future.

SkySafari 4 Pro includes NASA's latest Moon and Mars maps, with 8x the resolution of any other SkySafari version. It's an astronomical encyclopedia, with over 1500 encyclopedic descriptions of the constellations, stars, and planets written by professionals. And it includes 800 images from NASA space missions, the Hubble Space Telescope, and the world's foremost astro-photographers - now in breathtaking high definition on your iPad!

SkySafari 4 Pro takes advantage of Apple's latest Mac OS X features. It understands multitouch gestures and supports full-screen mode. Its responsive, fluid interface borrows from the best of SkySafari for iOS.

All this is built into SkySafari 4 Pro - you don't need an internet connection to use it. SkySafari 4 Pro will revolutionize your astronomical viewing experience. If you're serious about astronomy, it's a deal you can't afford to miss.

SkySafari Pro shows the Trifid Nebula (M 20)
with stars to 15th magnitude, and telescope controls.

The summer Milky Way high above the Keck Telescopes on Mauna Kea.


Mars gets a close shave from comet Siding Spring in October 2014.

SkySafari Pro's Moon map, based on 2009 Lunar Reconnaissance Orbiter
data, has 8x the resolution of any other SkySafari version.

Telescope Support

Our Pro version includes the same telescope control features as SkySafari Plus. It can point your GoTo or "Push-To" telescope anywhere in the sky, using your Mac's built-in WiFi, or a USB-to-serial adapter. It contains advanced capabilities which let you plan and log your observations, export them to other programs, and share them with your friends.