OSX Key: Keyboard Shortcut To Sleep, Log Out, & Shut Down

You might need to press and hold some shortcuts slightly longer than others. This helps you to avoid using them unintentionally.

Press to turn on your Mac or wake it from sleep. Press and hold for 1.5 seconds to put your Mac to sleep.* Continue holding to force your Mac to turn off.

power

Put your Mac to sleep.

option–command–power* or 
option–command–eject 

Put your displays to sleep.

control–shift–power* or 
control–shift–eject 

Display a dialog asking whether you want to restart, sleep, or shut down.

control–power* or 
control–eject 

Force your Mac to restart, without prompting to save any open and unsaved documents.

control–command–power* 

Quit all apps, then restart your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.

control–command–eject 

Quit all apps, then shut down your Mac. If any open documents have unsaved changes, you will be asked whether you want to save them.

control–option–command–power* or 
control–option–command–eject 

Immediately lock your screen.

control-command-q

Log out of your macOS user account. You will be asked to confirm. To log out immediately without confirming, press Option-Shift-Command-Q.

shift-command-q
option–shift-command-q

* Does not apply to the Touch ID sensor.

Reference: Mac keyboard shortcuts