How to find picture in Photos that shows up as wallpaper (after Systems Preferences work) in Mojave
Solution 1:
Here's a different approach: http://osxdaily.com/2011/11/20/show-the-location-path-of-current-wallpaper-in-mac-os-x/ In essence, type the following commands in Terminal.app:
-
Reveal the file path of the current wallpaper on the Desktop:
defaults write com.apple.dock desktop-picture-show-debug-text -bool TRUE; killall Dock -
Once revealed, hide the file path from the Desktop:
defaults write com.apple.dock desktop-picture-show-debug-text -bool FALSE; killall Dock
It works this way on all recent macOS versions from 10.10 Yosemite onward (including Catalina).