Not wallpaper, exactly, but (unless this has changed recently), you can run the screensaver as your wallpaper. /System/Library/Frameworks/ScreenSaver.framewo

Not wallpaper, exactly, but (unless this has changed recently), you can run the screensaver as your wallpaper. /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background https://osxdaily.com/2011/01/22/set-a-screensaver-as-your-desktop-wallpaper/ https://osxdaily.com/2011/01/22/set-a-screensaver-as-your-de... I used to do this once in a while, back in PowerPC days. Twenty years ago, it was amusing.