I have updated my wallpaper recently and now when I restart my computer or logout, my old wallpaper still shows (blurred, obviously) on the login screen. When I login, my new wallpaper is there. Is there a way to fix this?
Unfortunately this possible duplicate does not address my issue: How do I change the login screen background in macOS Mojave? This is not after updating to Mojave OS. I have not updated to it. So I do not have a "Mojave.heic"