Put your Mac to sleep or wake it
When you’re not using your Mac, you can save energy by putting it to sleep. When your Mac is in sleep, it’s turned on but consumes much less power. It takes your Mac less time to wake from sleep than it does to start up after being turned off.
Put your Mac to sleep
To put your Mac to sleep, do any of the following:
Choose Apple menu
On a Mac notebook, close the display.
If you’re using a Mac with a CD and DVD drive, press Option-Command-Media Eject key ⏏.
Tip: If your Mac has a Touch Bar, you can add the Sleep button to the Control Strip. Choose Apple menu
Wake your Mac from sleep
To wake your Mac, do any of the following:
Press a key on the keyboard, or click the mouse or trackpad.
On a Mac notebook, open the display.
If you connected your Mac to a display, you can customise the function of the display’s power button and the brightness buttons for the Mac in Change Displays Options preferences.