How to Adjust the Dimness and Brightness of Your MacBook and iMac Screens to be darker

MacBook try to adjust your display brightness for you automatically, dimming the display once you go from an outlet and adjusting the brightness to fit the overall light level nearby. However, you are able to adjust the brightness manually and even disable those features, if you want. By the way, how to adjust the dimness and  brightness of your MacBook screens to be darker? To find out that information, keep reading this entire article.

How to Adjust the dimness and brightness on a Mac manually?

You are going to find brightness-adjusting keys on your Mac keyboard, whether you are using a MacBook or a Mac desktop with an Apple keyboard. On a MacBook, please look at the top-left corner of your keyboard. The F1 and F2 keys are going to decrease and increase the dimness and brightness. On a Mac desktop PC, please look at the top-right corner of your keyboard. The F14 and F15 keys are going to do the same–look for the keys with sun logos on them. In this case, you only need to press the keys to decrease and increase your dimness and brightness. You are going to see an on-screen overlay appear, showing you the precise brightness level. So, if you want to adjust the dimness and brightness of your MacBook or iMac screens to be darker, you have to decrease the brightness.

How to Adjust the dimness and brightness on a Mac manually

If those keys are set up to function as standard F-keys instead of special action keys, so you will need to press and hold the Fn key as you tap them. If you are using a different keyboard with your Mac, you may discover the brightness keys in a slightly different place, or you may not view any brightness keys at all. In this case, if you only prefer using your mouse, you are able to adjust brightness in OS X, too. To do that, simply you are able to follow these steps below:

  • Firstly, on your Mac, you have to click the Apple menu.

click the Apple menu

  • After that, you have to choose System Preferences.
  • Then, you are able to click the “Displays” icon in the System Preferences window.
  • Lastly, you are able to adjust the Brightness slider to your desired level.

adjust the Brightness slide

Also, you are able to view a Contrast slider which you are able to use to adjust the display’s contrast, depend on the type of display connected to your Mac.

How to adjust brightness on an external display manually?

If you are using an external display created by Apple, you are able to see a Brightness slider in the System Preferences window and can control the brightness of your display by using the keys on your keyboard. But, those keys will not do anything and you will not have a Brightness slider in the System Preferences window if you are using an external display not created by Apple. If you are using a third-party display, you are going to need to adjust the brightness on the display. Please look for physical buttons on the display itself, oftentimes located near the power button. You may discover dedicated brightness up and brightness down buttons. Or you may need to press a menu or option button and then locate this option in an on-screen menu.

How to dim the display automatically when you are not plugged in?

Automatically, your MacBook is able to change its screen brightness when you are on battery power, dimming your display when you are on battery and creating it brighter when you are plugged in. This will helps to increase your MacBook’s battery life. To enable or disable this option, you have to open the System Preferences window and then click the Energy Saver icon. Please enable the slightly dim the display while on battery power checkbox under the Battery tab to create your Mac’s screen dimmer once on battery power. Or you are able to uncheck it to avoid your Mac from dimming the display automatically. Remember that unchecking it may drain your battery faster.

Unlike on Windows, you cannot customize the exact display brightness levels your Mac uses once it is plugged in and unplugged here. But, you are able to adjust your Mac’s display brightness to your desired level. This option is going to adjust the display brightness to be slightly dimmer than the brightness you select.

How to adjust brightness automatically based on ambient light?

Macs with built-in ambient light sensors has ability to monitor the light level nearby and adjust the display’s brightness level to be suitable automatically. This means creating the display brighter when it is bright near you, and creating the screen dimmer when you are in the dark. To discover this option, follow these steps:

  • Firstly, on your Mac, you have to click the Apple menu.
  • After that, you have to open the System Preferences window from the Apple menu.
  • The next step that you have to do is to choose Displays.
  • Please enable “Automatically adjust brightness” and your Mac will be able to use the ambient light sensor to adjust the brightness automatically. In other case, you will be able to disable this option and your Mac will not do this.

Automatically adjust brightness

If you do not see this option, it means that your Mac does not have an ambient light sensor. Remember that this option only applies to the ambient light sensor. Even if you disable the “Automatically adjust brightness” option, your Mac can still dim the display when you are on battery power if you have the Slightly dim the display while on battery power option enabled. The automatic brightness features will not disable you from being able to adjust the brightness manually. If you ever do not like the current brightness level, you are able to change it with a few key presses. But, your Mac may increase or decrease the brightness level automatically if the lightning near you changes, so you may have to tweak it again.