Nice change in the 10.11 builds. Images used for custom login screens no longer need to be messed with. Of course the install of 10.11 blew out the /Library/Caches folder, but the good news is that if you need/want a custom login window, they look good now.
If you haven't done it, the process is to use a graphic (I use .png) named:
Place it into /Library/Caches
Solved! Go to Solution.
Was excited to read this, since Yosemite killed our custom login background for all our clients with the blurred mess. No luck for me on this though; the login screen is the blurred El Cap background and the lock screen is gray :-(
Got the login screen background working now! The file had "no access" for
Everyone, needs 'read". Now just have to get the lock screen background to
match now, its still gray. I'll play with it this week @ JNUC. Thx for the help.