Working on a script that will replace the default login screen with a company branded image. I followed instructions at this link: https://jamfnation.jamfsoftware.com/discussion.html?id=12651
It states to replace /Library/Caches/com.apple.desktop.admin.png with your own image to accomplish this. However this doesnt work on 11.4 for me 😞
Anyone have any ideas?
We deploy a package which replaces the file you listed with our branding as well. However, it too does not appear with that blurred / frosted overlay, it's just the solid branded image.
Not sure how to fix this either, but just wanted to share that it happens to us as well. Not super critical or necessary for us though.
I believe this only sets the first time someone logs into the system. So the first users login determines the background. (This includes any fake users for setup or the adobe user for install on reboot items from what I've seen).
Princeton Public Schools