You can also click to select or deselect the Automatically adjust brightness checkbox.
Click and drag the Brightness slider to the left to decrease brightness or to the right to increase screen brightness.
To do so, click the Apple icon in the top-left corner.
You also have the option to change screen brightness in System Preferences.
Press the F2 key to increase the brightness of your screen.
Press the F1 key to decrease the brightness of your screen.
Now, here's how to increase or decrease your Mac screen brightness level: For more handy Mac tips, sign up for our free Tip of the Day Newsletter. 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. How to Make Computer Screen Brighter or Dimmer on Macīelow, we'll cover how to adjust your Mac screen brightness by using your keyboard and by accessing System Preferences.
Dim your screen to be gentler on your eyes if you’re in a dark environment or are planning to go to sleep soon.
Increase your Mac screen brightness when you’re going to watch a movie, play a game, or are working outside.