I'm using my brother's new MacBook and it's not letting me log out of the guest account. The only options I see are Restart and Shut Down. How can I log out of the guest account?
If you're not positive that your bro has Guest Account access set up, OS X introduced a new feature related to 'Find My Mac' that creates a sandboxed fake Guest Account in order to make it easier to recover your mac in case it gets stolen, luring the thief to go and connect to some random Wi-Fi with the guest account.
Maybe that's what's going on, you could easily restart and login to any account you like though.
sudo killall WindowServer
to kill WindowServer and force log out all graphical users. – CyberSkull Dec 27 '15 at 10:06sudo
. That would render any security measure useless! – klanomath Dec 27 '15 at 12:49sudo
with the guest account. In the default OS X setup only members of the admin group cansudo
. – klanomath Dec 27 '15 at 12:52