Change Energy Saver preferences on a Mac desktop computer
Use Energy Saver System Preferences to set options that control your Mac desktop computer’s energy use.
Note: Some of the options may not be available, depending on your Mac.
To open the pane, choose Apple menu > System Preferences, then click Energy Saver .
Power and UPS panes
Select energy-saving options for either power source. Your Mac uses those options when it’s getting power from that source.
You see the UPS button only if your Mac is connected to an uninterruptible power source.
Set a daily timetable for putting your Mac to sleep or turning it off and on. See Schedule your Mac desktop computer to turn on or off.
Turn display off after
Set the amount of time your Mac should wait before going to sleep.
Prevent your Mac from sleeping automatically when the display is off
Keep your Mac from going to sleep when the display sleeps.
Put hard disks to sleep when possible
Put the hard drive to sleep whenever the computer is inactive.
Wake for network access
Even in sleep mode, wake your Mac to provide access to shared resources, such as shared printers or Music playlists.
Start up automatically after a power failure
Start up your Mac after a power interruption.
Enable Power Nap
Have your Mac check for email, calendar and other iCloud updates while sleeping on battery power.
Slightly dim the display when using this power source
Reduce the brightness of the display while plugged into a UPS.
Show UPS status in menu bar
See the UPS’s charge level in the menu bar.
Set the time or battery level at which the Mac shuts down when using a UPS. See Set when your Mac shuts down while using a UPS.
Restore all your preferences to the default options.