how to return to lock screen after switching user This seems such a simple thing, I can't believe I can't work out how to do it or find the solution on the net.
My partner's MACbook Pro (running 10.15) laptop was on the lock screen, and I stupidly pressed &quot;switch user&quot; and got to the switch-user screen with login user/password boxes and  &quot;sleep&quot;, &quot;restart&quot;, &quot;shutdown&quot; as other options.  Turns out she doesn't know her username (it is a work's machine) and has been logging in with a password only on the locksceen since receiving the machine.  So my simple question is, how do I return to the lock screen after &quot;switching user&quot;?  It would seem so obvious, but I'm in real trouble if I don't find the answer in the next 24 hours...
If you restart the device, your user accounts will appear with usernames. Simply select her user account and sign in with password.
If all of the user account do not appear after restarting, hold the power button down for 30 seconds. Then power back up like normal.