Download SkySafari 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

SkySafari Pro for Mac OS X requires an Intel processor, OS X version 10.6 thru 10.8, and a minimum screen resolution of 1280 x 720 pixels. To run SkySafari Pro, you need a serial number; you can purchase one from within the program or from this page.

Operating System Download Size Description
Mac OS X 10.6 - 10.9 SkySafari Pro 1.8 758.9 MB (758,911,424 bytes) Disk image (.dmg)

SkySafari Pro for Mac OS X is distributed as a compressed disk image file. To install it:

  1. Download the disk image file. Most web browers will save it into your Downloads folder.
  2. Double-click the file's icon to mount the image on your desktop. Accept the license agreement.
  3. If this fails, your download was probably incomplete or corrupted; try downloading again.
  4. Copy the SkySafari Pro application from the disk image to the Applications folder on your hard drive.
  5. To un-install, drag the SkySafari Pro application on your hard drive to the trash.
  6. SkySafari Pro owners may want to deactivate their software before uninstalling; see below.

SkySafari Pro Serial Numbers and Activation

SkySafari Pro requires a serial number to run. The first time you launch SkySafari Pro, the program will ask you to enter your serial number. If you don't have one, you can purchase a new serial number from within the app. After a successful purchase, close the purchase confirmation window, and your copy of SkySafari Pro will be activated and fully functional.

Please Note: You need to purchase and activate SkySafari Pro from a user account on your Mac with administrative privileges! If your user account does not have admin priveleges, the purchase and/or activation may fail. If you're still having trouble activating your software, check the FAQ - see question #3 - for additional suggestions.

You can activate SkySafari Pro on up to three computers for your own personal use. You don't need to purchase additional serial numbers for the other two computers - just enter the same serial number when the app launches. You will need an live internet connection to activate the software, but you only need to activate it once. After it has been activated, SkySafari Pro can run without an internet connection.

If you have used all three of your SkySafari Pro activations, you can still activate it on a new computer. However, you'll first have to deactivate it on one of your old computers. Then enter your serial number into SkySafari Pro on the new computer. You may need to wait a few minutes before entering the serial number on the new computer.

Southern Stars uses eSellerate, a division of Digital River, for serial number purchases and activations. Charges for Southern Stars product serial numbers may appear under the name DRI*ESELL SOFTWARE on your credit card billing statement. By default, eSellerate offers a USD $4.99 "Extended Download" service when you purchase a new serial number. If you don't want this, you can delete it by clicking the small trashcan icon in the "Remove" column for this line item.

How to Purchase Serial Numbers without SkySafari Pro

Normally, you'd purchase a SkySafari Pro serial number from within the application. But if you can't do this for some reason, or if you want to purchase site license packs of multiple SkySafari Pro serial numbers, then you can purchase serial numbers directly from eSellerate's web site, using your web browser. Your serial number(s) will be emailed to you after your purchase is complete.

Click this link to purchase a SkySafari Pro serial number, or site license packs of multiple SkySafari Pro serial numbers.

SkySafari Plus and Pro

The differences between SkySafari, SkySafari Plus, and SkySafari Pro for Mac OS X are listed here.

Briefly, SkySafari's basic version is intended for beginners in astronomy, or those who intend to do only naked-eye or binocular observation. It has a simpler feature set, a smaller database of 120,000 stars and 220 deep sky objects, and does not control a telescope. It's also an inexpensive introduction to our Mac software - it only costs a few dollars on the Mac App Store. And if you like it, there's more where that came from!

SkySafari Plus adds more advanced features, 2.5 million stars, 31,000 deep sky objects, and wired or wireless telescope control. To control a telescope, you'll need either a USB-to-serial adapter (like the KeySpan USA-19HS), or a Wi-Fi-to-serial adapter like SkyFi. A Bluetooth-to-serial adapter like the Starry Night BlueStar may also work, but we have not tested this. If you're using a USB or Bluetooth serial adapter, make sure you've installed its drivers correctly.

SkySafari Pro contains the same feature set as SkySafari Plus, but includes a hugely-expanded database: 15 million stars from the Hubble Guide Star Catalog, 750,000 deep sky objects, and over 550,000 solar system objects - including every comet and asteroid ever discovered. It's geared toward advanced amateur observers who simply want everything available in a mobile astronomy package.

SkySafari and SkySafari Plus for Mac OS X are both available on the Mac App Store. SkySafari Pro for Mac OS X is available exclusively by download from our web site.