How to turn on Night Shift on Mac

Night Shift is a colour-altering screen mode designed to help you get a good night’s sleep. Here’s how to use it on Mac

Night Shift is an optional feature that warms up the colour palette of a device’s screen, particularly late in the day. It’s believed that cooler (bluer) artificial light from a screen can affect a person’s circadian rhythms and disturb their sleep[1], and Night Shift is designed to stop this happening.

Night Shift was first made available on iPhone and iPad as part of the iOS 9.3 update, but it’s since been added to macOS. In this article we explain how to use Night Shift on the Mac. See also: Best sleep apps for iPhone[2]

Update your Mac

Night Shift was added as part of the Sierra[3] update, so you’ll need to be running that or a later version of macOS.

Here’s how to update macOS on a Mac[4].

Turn on Night Shift manually

If at any point you decide that your Mac’s screen is making you feel tired or straining your eyes, you fancy a snooze in a bit etc, you can switch on Night Shift mode manually. This is very easy to do.

Notification Centre

Open the Notification Centre sidebar (if it’s not open already) by clicking the icon with three dots and three lines at the very top right of your Mac’s screen, or by swiping from right to left on your trackpad. Scroll up a little and two toggle switches – Night Shift and Do Not Disturb – will appear above the date (if you’re in the Today screen) or the latest notification (if you’re in the Notifications screen).

Click the Night Shift toggle; it will turn blue, while the whole screen will change to a warmer colour palette. How to use & turn on Night Shift on Mac: Notifications Centre

Siri

This may be the quickest method of all. Click the Siri icon at the top right and say: “Turn on Night Shift.”

How to use & turn on Night Shift on Mac: Siri

To switch it off again, you can click the Night Shift toggle in the Siri pane, or activate Siri again and say: “Turn off Night Shift.”

System Preferences

Open System Preferences > Displays, and click the Night Shift tab on the far right. Where it says Manual, tick the box that says ‘Turn On Until Tomorrow’. How to use & turn on Night Shift on Mac: System Preferences

Schedule Night Shift automatically

Generally speaking we’d say it’s a far better idea to set Night Shift to automatically follow a schedule – otherwise you’re dependent on thinking about your sleep hygiene[5] at some point late in the day.

As before go to System Preferences > Displays and click the Night Shift tab. In the dropdown menu you can choose the Sunset to Sunrise option or create your own custom schedule. Fill in the From and To fields and Night Shift will come on automatically between those times.

How to use & turn on Night Shift on Mac: Schedule

Adjust the colour shift

In the same section of System Preferences (Displays > Night Shift) you can adjust how radically Night Shift will alter the colour balance of your screen.

Use the slider labelled ‘Color Temperature’ to suit your preferences.

As long as you’re holding down the mouse button to move the slider, the screen will change colour to give you a preview; once you let go, it will slowly fade back into the standard setting for right now, whether that’s Night Shift or your conventional colour balance.

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References

  1. ^ Wired (www.wired.com)
  2. ^ Best sleep apps for iPhone (www.macworld.co.uk)
  3. ^ macOS Sierra review (www.macworld.co.uk)
  4. ^ how to update macOS on a Mac (www.macworld.co.uk)
  5. ^ Sleep Foundation (sleepfoundation.org)

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