The World on Your Desktop.

EarthDesk replaces your Macintosh desktop picture with a stunning dynamic image of our planet continuously updating in the background while you work.

* Real-time clouds (updated at 3-hour intervals) with transparency and moonlight reflection.
* Accurate sun, moon and city lighting.
* High quality twilight shading.
* Automatically updates when waking from sleep.
* Moonlight shading can be turned on or off.
* Complete multi-display support.
* Eleven different map projections.
* Enhanced satellite, political and natural maps

Go to this URL for more details : http://www.xericdesign.com/earthdesk.php

Don't use any serial and other firewall... all is OK with this file or/and this patch