This is a simple thrown together library to periodically download unsplash images into a wallpapers directory. You can then tell macos to cycle through the directory, using them as wallpaper images.
I'm not using the official unsplash library because eh.
The launchctl script will run the unsplash downloader every 6 hours. You should modify it to suit your preferences. (Actually you should modify the whole script to suit your preferences).
This library is not maintained. It is put here for convenience. Issues will be ignored. Fork and modify for yourself.