Hi all, I've tried searching for this issue but can't find any mention of it anywhere. Since installing the High Sierra beta I have been unable to unlock any pane in System Preferences, it won't accept my credentials (it shakes as if they are incorrect). All other authentication seems to be working fine, e.g. I can install software, change file permissions etc. I tried logging in as root and unlocking the Security & Privacy pane, same thing happens. I've noticed a "loginwindow is not entitled" message in console every time I attempt to authenticate in System Prefs. I have tried running First Aid but no issues are found. I converted to APFS during install but I'm unsure of the implications of that as far as permissions go. Does anybody have any ideas as to what might be causing this? Cheers, Jake.