Star Wallpaper for Mac is a very interesting software!
It can automatically updates your desktop background from your choice of image sources everyday! This tool will automatically download picture and set it as desktop background image. Such as automatically find great photos from National Geographic website daily and allow you to use them as your desktop wallpaper when you start up your Mac.

Quick Start:

After you installed and launched Star Wallpaper, you will find it at system status menu bar (the top right corner) as follow.

Click it's icon to open main panel, there are few settings. The tool will work in accordance with the settings.
That's all!

Please note:

To set downloaded photo as desktop backgroud automatically, please ALLOW "Star Wallpaper" to access to control "Finder". It's safe as Google Chrome.