USA Today/tech has published a showcase of the Mac OS X/OS X/macOS wallpapers throughout the years. It’s very cool. By the way, TMO discovered which galaxy was used for OS X Mountain Lion back in 2012.
Check It Out: All the macOS Wallpapers: Jaguar to Catalina
To be fair, these are the default desktop wallpapers for each OS. They don’t include the 40 or so other optional wallpapers Apple has always included.