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How to Stop Screen From Dimming Automatically on Mac

By: Sam Patwegar | September 27, 2024

The default tendency on a MacBook is to conserve battery life by automatically dimming the screen or the brightness of its display based on certain conditions. However, it is also possible to stop the screen of your Mac from automatically dimming.

In general, the display or screen of a MacBook can automatically become dim or go down in brightness in the following 3 cases.

  1. When the Mac is left inactive for a while.
  2. When Mac is running on battery power.
  3. If the ambient light sensors on Mac detect brightness in the room.

Note: If you are looking to stop your MacBook from Sleeping, you can refer to this guide: How to Stop Mac from Automatically Sleeping.

1. Stop Mac Screen from Dimming When Inactive

As you must have noticed, the screen of your Mac starts automatically dimming, when it is left inactive for a while, with trackpad not touched or nothing typed on the keyboard.

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A reasonable solution to this issue is to increase the duration after which the MacBook can begin to dim its display.

1. Click on the Apple Icon in top-menu bar and select System Settings or System Preferences in the drop-down menu.

Open System Settings on Mac

2. On the System Settings screen, click on the Energy Saver Icon.

3. On the next screen, switch to Battery tab and use the Turn Display Off After slider to increase the duration.

Turn Display Off After Slider on Mac

4. Next, switch to Power Adapter tab and use Turn Display Off After Slider to increase the duration.

Change Sleep Timer While Connected to Power on Mac

2. Stop Mac Screen From Dimming When Unplugged

In order to save Battery life, the default setting on a MacBook is to slightly reduce the brightness of the screen, when it is unplugged from power supply.

If required, you can prevent the MacBook from dimming its display while running on battery power by following the steps below.

1. Click on Apple Logo in the top-menu bar and select System Settings or System Preferences in the drop-down menu.

Open System Settings on Mac

2. On the System Preferences screen, click on Energy Saver option.

3. On the next screen, switch to Battery tab and uncheck Slightly dim the display while on battery power option.

Slightly Dim the Display While on Battery Power Option on Mac

Now, whenever your Mac is running on battery power, the display brightness will stay exactly the same as it was while the computer was connected to power supply.

3. Stop Mac Screen from Dimming Due to Lightning Conditions

If required, you can also prevent your MacBook from automatically dimming its display based on the surrounding lighting conditions.

1. Click on Apple Logo in top-menu bar and select System Settings or System Preferences in the drop-down menu.

Open System Settings on Mac

2. On the System Preferences screen, click on the Displays option.

3. On the next screen, switch to Display tab and uncheck Automatically adjust brightness option.

Stop Mac From Automatically Adjusting Brightness

After this, you won’t find the screen of your Mac Automatically Dimming due to change in the lighting conditions of your room.

Sam Patwegar

Brings practical experience in technical writing from an engineering background to produce fluff-free, easy-to-follow and well tested troubleshooting guides and informative tech-related articles on this website.

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