We’ve been making high-quality native MacOS audio software since this was cutting edge, way back in 2002. Rogue Amoeba is proud to sponsor the 512 Pixels Wallpaper and Screenshot Library.
If you are looking for Mac OS 9 wallpapers, this page is for you. If you want to see detailed screenshots of every release of OS X, click here. While great in their day, the early wallpapers are now quite small in the world of 5K and 6K displays.
As you can see, I have collected them all here. Every major version of Mac OS X macOS has come with a new default wallpaper.