Historically, it was possible to hide users from the login screen. In pre-10.5 times, one simply changed a userid to < 500 and:
sudo defaults write /Library/Preferences/com.apple.loginwindow Hide500Users -bool YES
Since ~10.5, the sequence is:
sudo defaults write /Library/Preferences/com.apple.loginwindow HiddenUserList -array-add
sudo defaults write /Library/Preferences/com.apple.loginwindow SHOWOTHERUSERS_MANAGED -bool false
However, I am unable to get my admin account to hide from the window in 10.7 using FileVault 2. Has anyone else had a similar experience and does anyone know how to make this work properly?
Best Answer
This change didn't get implemented/respected/carried forward in Lion 10.7 initial release build. It's an open bug with no ETA on a fix or resolution.