The fastest way to lock your screen a modern Mac is to use the key combination
Ctrl
+ Shift
+ Power
1.
Using an external PC keyboard is a more tricky because it probably won’t have either a power or eject button. To get one working, install Karabiner and remap Pause/Break to Power:
Ctrl
+ Shift
+ Break
will now trigger the lock.
1Power
used to be Eject
, but then Macs started shipping without optical
drives.
Did I make a mistake? Please consider sending a pull request.