This is X-Plane version 9 on DVD for Mac OS, Windows, and Linux platforms. It ships on six dual-layer DVDs which hold all the scenery from latitudes from 74 degrees north to 60 degrees south.
This purchase includes free Internet updates for the entire X-Plane 9.xx run--that is, you'll recieve version 9.00, version 9.22, 9.30, etc. all the way up to 9.99 if it exists.
Note: Some stores sell special distributions of X-Plane that do not have the Mac, Windows, and Linux versions all on the same discs. In order to ensure that you get the version of the software for all three operating systems, you should only buy here,or at X-Plane.com.