I am trying to enable and disable the screensaver password requirement from the command line.
defaults read com.apple.screensaver
shows a variable askForPassword set to either 0 or 1, depending on whether I configured a password requirement in System Preferences or not.
defaults write com.apple.screensaver askForPassword 1
defaults write com.apple.screensaver askForPassword 0
enable and disable the password setting, or so I thought.
What I find instead is that the commands indeed check and uncheck the checkbox in System Preferences under Security but do not affect the screensaver at all.
If I enable the password in System Preferences and then disable it using the second defaults write command, the checkbox in System Preferences is unchecked, but the screensaver will still ask for a password. Only checking and unchecking the checkbox in System Preferences can change this behaviour now.
And if I disable the password in System Preferences and then enable it using the first defaults write command, the checkbox in System Preferences is checked, but the screensave won't ask for a password. Only unchecking and checking the checking the checkbox in System Preferences changes the behaviour afterwards.
What's going on?
I can imagine that this is a global setting and I should modify /Library/Preferences/com.apple.screensaver instead of the user domain. But in that case, why is there an effect on the System Preferences checkbox?