Mac OS X 10.7 Lion
Replace the Apple logo: Swap /System/Library/PrivateFrameworks/LoginUIKit.framework/Versions/A/Frameworks/LoginUICore.framework/Versions/A/Resources/appleLinen.png
with your own PNG, replace the “@2x” companion accordingly. I’m using this one (hard to see):
- Show basic host information upon clicking into the upper right corner:
sudo defaults write /Library/Preferences/com.apple.loginwindow AdminHostInfo HostName
- Show text on the login screen:
sudo defaults write /Library/Preferences/com.apple.loginwindow LoginwindowText "Max-Planck-Institut für Chemische Physik fester Stoffe"
- Display a message on the locked screen: Go to the Security & Privacy preference pane, and under the General tab, tick the checkbox Show a message when the screen is locked then add your message.
- Hide the admin02 user (see also Apple’s support page):
sudo defaults write /Library/Preferences/com.apple.loginwindow HiddenUsersList -array-add admin02
- Set loginWindow screen saver idle time to five minutes:
sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 300
- Set loginwindow screen saver:
sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowModulePath "/System/Library/Frameworks/ScreenSaver.framework/Resources/Computer Name.saver"
- Set loginwindow screen saver message:
sudo defaults write /Library/Preferences/com.apple.ScreenSaver.Basic MESSAGE "Max-Planck-Institut für chemische Physik fester Stoffe"