How to Change Brightness Level on Mac

* This article is from our Tip of the Day newsletter. . *

It's not unusual for me to adjust the screen brightness on my Mac multiple times in a day. When I'm working in lower-light environments, a dimmer screen feels easier on my eyes. At the same time, I often work outdoors or in well-lit environments, in which case, the ability to increase my screen brightness can make a big difference in how well I'm able to see what is on my display. Let's cover how to adjust the monitor brightness on your Mac.

Related: How to Sync Messages from iPhone to Mac

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Why You’ll Love This Tip

  • Increase your Mac screen brightness when you’re going to watch a movie, play a game, or are working outside.
  • Dim your screen to be gentler on your eyes if you’re in a dark environment or are planning to go to sleep soon.

How to Make Computer Screen Brighter or Dimmer on Mac

Below, we'll cover how to adjust your Mac screen brightness by using your keyboard and by accessing System Preferences. It's important to note that for the keyboard shortcut, some Mac computers have an increase brightness key and a decrease brightness key. Others have a touch-sensitive Control Strip that includes the same functions. For more handy Mac tips, sign up for our free Tip of the Day Newsletter. Now, here's how to increase or decrease your Mac screen brightness level: 

  1. Press the F1 key to decrease the brightness of your screen. 

    Press the left-hand brightness key to decrease brightness. 
  2. Press the F2 key to increase the brightness of your screen. 

    Press the right-hand brightness key to increase brightness. 
  3. You also have the option to change screen brightness in System Preferences. To do so, click the Apple icon in the top-left corner.

    Click to open the Apple menu.
  4. Click System Preferences.

    Click on System Preferences…
  5. Click Displays.

    Click on Displays.
  6. Click and drag the Brightness slider to the left to decrease brightness or to the right to increase screen brightness. 

    Click anywhere on the Brightness bar to set the brightness: Left is darker, right is brighter.
  7. You can also click to select or deselect the Automatically adjust brightness checkbox. (When this option is selected, your Mac will automatically increase brightness when it senses more light, and decrease brightness when it senses less light.)

    You can also click to check or uncheck the Automatically adjust brightness checkbox.

That's all there is to it! Now you can easily adjust the brightness of your Mac screen by using your keyboard or by accessing System Preferences. 

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Author Details

Devala Rees's picture

Author Details

Devala Rees

Devala Rees has been a writer since the age of eleven, and a loyal user of Apple products for even longer. His writing background is quite eclectic, from freelance professional articles to Hindu religious scholarship to fantasy novels. Much of his writing on various topics can be found on