Andrew Levitt has published a pretty cool video about the macOS wallpapers:
My friends and I visited and recreated every default Apple wallpaper on a one week road trip. Starting with MacOS Mojave in Death Valley National Park, we traveled to each of Apple’s California Locations to try and make an identical photo to their wallpapers that come installed with every new Mac computer.
We visited Mojave, Sierra, High Sierra, El Capitan, Yosemite, and Mavericks. Now we just have to go visit Catalina for the MacOS Catalina launch!
As someone deeply interested in macOS wallpapers, I really enjoyed this video: