The 1.1 version of Cosmo Desktop for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Cosmo Desktop for Mac lies within Theming Tools, more precisely Wallpapers.
The following versions: 1.1 and 1.0 are the most frequently downloaded ones by the program users. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X was originally designed by Pulsely. This free program is developed for Mac OS X 10.7 or later.
From the developer:
Cosmo Desktop is a Mac application that serves the latest NASA astronomy pictures to your desktop. You can set your Mac desktop to the beautiful Astronomy picture right to your Mac in a few clicks.
All astronomy pictures are courtesy of the NASA Astronomy Pictures of the Day under public domain, or their respective owners.
You may want to check out more Mac applications, such as Desktop Reporting, Cosmos or Cosmo Run, which might be related to Cosmo Desktop.