Keep your Mac from going to sleep automatically: Click Power Adapter, then select “Prevent your Mac from sleeping automatically when the display is off”. Set the amount of time your computer should wait before going to sleep while plugged into a power adapter: Click Power Adapter, then drag the “Turn display off after” slider. Set the amount of time your computer should wait before going to sleep while on battery power: Click Battery, then drag the “Turn display off after” slider. See Schedule your Mac notebook to turn on or off. Set your Mac to go to sleep and wake up at a specific time: Click Schedule, then select the options you want to use. On your Mac, choose Apple menu > System Preferences, then click Battery.
