Mac App To Reduce Blue Light

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Studies have shown that exposure to bright blue light in the evening can affect your circadian rhythms and make it harder to fall asleep. Night Shift uses your computer's clock and geolocation to determine when it's sunset in your location. It then automatically shifts the colours in your display to the warmer end of the spectrum. In the morning it returns the display to its regular settings.

How to set up Night Shift

Make sure that your Mac meets the system requirements for Night Shift, then follow these steps:

Sep 11, 2018  One of the most popular blue light filter applications is F.lux®. Like most blue light filter applications, F.lux reduces the blue light coming from your screen and boosts the warmer colors like red, yellow, and orange. The iMac screen, like all electronic screens, gives off high energy HEV blue light. While you could use Night Shift (built-in to macOS) or a program like Flux, I recommend getting an iMac blue light filter for best results. A filter will block the.

  1. Choose Apple menu () > System Preferences, then click Displays.
  2. Click the Night Shift tab.
Mac

Schedule: Create a custom Night Shift schedule or have Night Shift turn on automatically from sunset to sunrise.

Reduce Blue Light Mac

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Manual: Control Night Shift manually.

  • If Night Shift is off, select the checkbox to turn Night Shift on until 7 a.m. If you're using a schedule, Night Shift automatically turns off at the scheduled time.
  • If Night Shift is on, deselect the tickbox to turn Night Shift off. If you're using a schedule, Night Shift turns on again at the scheduled time.

Colour Temperature: Drag the slider to make the colour temperature more or less warm when Night Shift is on. Warmer colour temperatures show more yellow and less blue.


You can control the Manual setting from Notification Center as well. Click the Notification Center icon in the menu bar or swipe left with two fingers from the right side of your trackpad. Then scroll up to reveal the Night Shift setting.

System requirements for Night Shift

Night Shift requires macOS Sierra 10.12.4 and one of these Mac computers, using the built-in display or the displays listed:

  • MacBook models from early 2015 or later
  • MacBook Air models from mid 2012 or later
  • MacBook Pro models from mid 2012 or later
  • Mac mini models from late 2012 or later
  • iMac models from late 2012 or later
  • Mac Pro models from late 2013 or later
  • Apple LED Cinema Display
  • Apple Thunderbolt Display
  • LG UltraFine 5K Display
  • LG UltraFine 4K Display

Learn more

  • Learn how to use Night Shift on your iPhone, iPad or iPod touch.
  • If you have a Mac that supports True Tone, you can use True Tone and Night Shift at the same time.