Am I the only one that’s getting tired of Leopards fireworks loginscreen? It turns out you can replace that image with anything of your choice. Heres how.
Go to
Hard Drive > System > Library > CoreServices > DefaultDesktop.jpg
replace that jpg with your new backdrop
Type in your admin password when prompted and you’re done!
Just remember to backup the original DefaultDesktop.jpg incase you decide to switch back to the default at a later date.
ErikPersson.com 
6 replies on “Mac Tip: Change The Login Screen In Mac OSX”
does this work on 10.5?
is there a way to change the text on the blue login plate ?
Yes it will
Apple has named all of their 10.x releases after a big cat
10.5 = Leopard
10.4 = Tiger
10.3 = Panther
10.2 = Jaguar
10.1 = Puma
10.0 = Cheetah
i cant find de defaut dsktop on core services n i,mma 10.4 mac book pro…some1 help me.
I wasn't able to find defaultdesktop.jpg in my core services either 10.4
10.4 & lower, the “default desktop” thingy is called “deep blue” or something or other.