Wallpaper folder
Does anyone knows how to add the old wallpaper images to the new Desktop Pictures folder on Catalina?
MacBook
Yes. You can see all old pics from the Finder>Go>Go To Folder copy and paste:
/Library/Desktop Pictures
newer and Catalina, copy and paste:
/System/Library/Desktop Pictures
You can change images, but the System folder is read only.
About the read-only system volume in macOS Catalina - Apple ...