As far as I can tell this is for WallpaperAgent, an extension to `com.apple.wallpaper` that are ran by WallpaperAgent on the desktop. For screensavers check my other post, I posted a sample the private screensaver api to bypass that.
Apple's uses both for their own "Aerials" and they have a sync system to share the position between the screensaver player and the desktop player.
Apple's uses both for their own "Aerials" and they have a sync system to share the position between the screensaver player and the desktop player.