With just a few clicks in System Preferences, you can go through all the resolutions supported on your Mac. If you're using a Retina display, you can switch from 'Default for display' to 'scaled' and either make things big or make use of all the pixels at your disposal.
By default, your Mac adjusts the screen brightness for current light conditions using the built-in ambient light sensor.
Set the brightness automatically
- Choose Apple menu > System Preferences, click Displays, then click Display.
- Select “Automatically adjust brightness.”
Manually set the brightness
- Choose Apple menu > System Preferences, click Displays, then click Display.
- Drag the Brightness slider to adjust the brightness of your display.
In certain low-light ambient lighting conditions, such as indoors, the default setting for automatic brightness on your display may limit the maximum brightness to a level that's below its absolute maximum. To set the brightness to the absolute maximum level in these lighting conditions, turn off “Automatically adjust brightness”, then set the brightness to the maximum level.
If you turn off automatic brightness, you should turn it back on later to preserve battery life.
Learn more
Learn more about changing your Mac display's brightness.
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