Every major version of macOS comes with a new default wallpaper, and this website has collected them all. The early wallpapers may now seem small on high-resolution displays, but they were great in their time. The website also offers detailed screenshots of every release of OS X and wallpapers for Mac OS 9. The website is sponsored by Rogue Amoeba, a company that creates macOS audio software, and they have utilities for all your audio needs. Each version of macOS has its own unique wallpaper, and there have been changes in the interface and design over the years. The latest version, macOS Monterey, builds on the features of macOS Big Sur and brings Shortcuts and other features from iOS and iPadOS 15. The website offers downloads of the wallpapers in 5K and 6K versions, and you can support the website by becoming a member.
https://512pixels.net/projects/default-mac-wallpapers-in-5k/