Understanding Mac's Display Sleep Mode

what does display sleep mean on mac

MacBooks have two different sleep states: display sleep and sleep. Display sleep leaves the computer running while only turning off the screen, which can be reactivated by touching the trackpad or pressing a key. Sleep mode, on the other hand, puts the entire computer to sleep, using less power than display sleep. This mode can be activated by closing the lid of the laptop, selecting Sleep from the Apple menu, or via a timer.

Characteristics and Values of Display Sleep on Mac

Characteristics Values
Display Screen goes blank after a certain period of inactivity
Computer Still running in the background
User Action Can be woken up by touching the trackpad or pressing a key
Power Usage Reduces power usage but uses more power than full sleep mode
Security Requires a passphrase or fingerprint to wake up
Network Connections May be lost after display sleep

shunsleep

Display sleep vs system sleep

Display sleep and system sleep are two different power-saving modes on Mac. Display sleep is when the screen goes blank after a certain period of inactivity. The computer is still on and running, but the display is turned off to conserve energy. You can wake the display by touching the trackpad or pressing a key.

System sleep, on the other hand, puts the entire computer into a low-power state. In this mode, the hard drive stops spinning, and the CPU significantly reduces its power consumption. The computer can be woken from system sleep by opening the lid (for laptops) or pressing a key.

One key difference between the two is that display sleep allows you to take advantage of certain services, like file sharing, while the computer is asleep. With system sleep, most of the device's parts are shut down, so you can't access these services. Additionally, system sleep may require a passphrase or password to wake the computer, providing an extra layer of security.

Another distinction is the LED indicator on the front of the computer. During display sleep, the LED remains steadily lit, whereas during system sleep, it fades slowly between off and on, resembling a human breathing pattern.

It's worth noting that newer Macs automatically enter system sleep a few seconds after initiating display sleep, which can be an inconvenience for some users. However, this behaviour can potentially be modified using the pmset terminal command.

shunsleep

How to put your Mac to sleep

Display sleep refers to when the screen of a Mac goes blank after a certain amount of time. The computer itself is still running, and you can wake up the screen by touching the trackpad or pressing a key.

To put your Mac to sleep, you can try the following methods:

  • Close the lid of your laptop.
  • Select Sleep from the Apple Menu.
  • Set a timer.
  • Use a keyboard shortcut:
  • If your keyboard has a power button, you can use Shift+Control+Power.
  • If your keyboard has a Touch ID button, you can hold the Touch ID button for 1.5 seconds to lock the screen. Then, your Mac should go to sleep shortly after.
  • Alternatively, you can use the shortcut Control/Command/Q.
  • If your keyboard does not have an eject key, you can use Shift+Command+Eject.
  • Use Control–Shift–Power or Control–Shift–Media Eject to put your displays to sleep.
  • Set up a Hot Corner:
  • Go to System Settings, Desktop & Dock, then click the Hot Corners button at the bottom of the list.
  • Choose a corner and set it to "Put Display To Sleep."
  • You can also hold a modifier key, like Command, so that moving the pointer to the corner requires both the modifier and the pointer.

shunsleep

How to wake up your Mac from display sleep

Display sleep on a Mac refers to when the screen goes blank after a certain period of inactivity. The computer itself is still on, but the display is temporarily deactivated to conserve energy. This feature is useful when stepping away from your Mac for a short period, as it allows you to quickly resume your work when you return.

Move your mouse or trackpad

Simply moving your mouse or trackpad may be enough to wake your Mac from display sleep. This is because Bluetooth devices can wake the system. If you want to prevent this behaviour, you can follow these steps:

  • Click on the Apple logo
  • Select "System Preferences" or "System Settings"
  • Choose "Bluetooth"
  • Click "Advanced"
  • Uncheck the option "Allow Bluetooth devices to wake this computer"

Press any key on your keyboard

Similarly to the above, pressing any key on your keyboard may be enough to wake your Mac.

Open the lid of your laptop

If you are using a MacBook with a physical keyboard, opening the lid will wake the device.

Reset the SMC (System Management Controller)

The SMC is a subsystem that manages various low-level settings, including sleep and wake. Resetting it can help fix issues with waking your Mac from sleep:

  • Shut down your Mac by holding down the power button for a few seconds
  • Press and hold Control, Option, and the left-side Shift key for ten seconds. If you are using a T2-based Mac, use the right-side Shift key instead.

Reset NVRAM (Non-Volatile Random-Access Memory)

NVRAM is used to store certain system-related settings, and resetting it can help fix sleep issues:

  • Shut down your Mac by pressing and holding the power button
  • Press and hold the power button, Option, Command, P, and R keys for 20 seconds
  • Release all the keys when you hear the startup chime twice. If you are using a T2-powered Mac, there will be no startup sound, but the Apple logo will show up and off twice.

If none of these methods work, there may be other underlying issues with your Mac.

shunsleep

Differences in power usage between display sleep and normal sleep

Display sleep and normal sleep refer to two different power states in a Mac system. Display sleep, also known as "Turn Display Off", is when the display is turned off after a set period of inactivity, but the computer is still running in the background. The power to the display is sharply reduced, and if you have an external monitor, the power light will usually glow orange instead of green, indicating that the circuitry is still powered on but the display itself is off.

Normal sleep mode, on the other hand, puts the entire computer, including the display and hard disk, into a low-power state. Apps do not continue running normally, and everything is essentially frozen. The power indicator on the computer will pulsate, flash, or turn amber, depending on your Mac model. Normal sleep mode uses less power than display sleep, but both modes help reduce power usage when the computer is not in active use.

There are several ways to activate display sleep on a Mac. One method is to go to System Settings or System Preferences, select "Lock Screen", and then choose a time next to "Turn display off when inactive". Another way is to use the shortcut Control + Shift + Eject for immediate activation. To wake the computer from display sleep, you can press a key on the keyboard, click a mouse button, connect or disconnect a USB device, or open the lid if it's a portable Mac.

To activate normal sleep mode, you can press the Sleep button on the Touch Bar, select the Sleep command from the Apple Menu, or simply close the lid. Waking the computer from normal sleep mode can be done by holding the correct finger on the Touch ID sensor, which will take you back to where you left off.

It is important to note that the behaviour of the system during these sleep modes may vary depending on the specific Mac model and its configurations. Additionally, certain settings, such as Power Nap and Wake for Network Access, can cause the system to periodically wake up and perform tasks, which may impact power usage.

shunsleep

Using the pmset command to change display sleep settings

Display Sleep is a feature on Mac that turns off the screen and keyboard backlights to conserve energy. The pmset command can be used to change display sleep settings on macOS. Pmset is a command-line utility that allows users to manipulate power management settings.

To use the pmset command, open the Terminal app on your Mac. Then, use the following syntax: "pmset -a displaysleep [time in minutes]". For example, to set the display sleep timer to 20 minutes, you would use the command "pmset -a displaysleep 20". You can also disable display sleep by using "0" as the value. For example, "pmset -a displaysleep 0" will disable the display sleep feature.

It's important to note that only privileged users can modify power management settings using pmset. Additionally, pmset must be run as root to modify any settings.

Frequently asked questions

Display sleep is when the screen goes blank after a certain amount of time. The computer is still running, but the display is locked.

You can wake up the screen by touching the trackpad or pressing a key.

To put your Mac into display sleep, you can press the power button or close the lid. You can also set your Mac's display to turn off automatically when it's inactive.

Display sleep leaves the computer running, while system sleep puts the entire computer to sleep. System sleep uses less power, but both reduce power usage when the computer isn't in use.

Written by
Reviewed by
Share this post
Print
Did this article help you?

Leave a comment