How to Adjust Mac’s Display Brightness in Big Sur, Catalina, Mojave, High Sierra and Earlier

Last Updated on Jan 5, 2021

Alternate Ways to Chang/Adjust Mac Display Brightness on OS X (10.13.2) by using intensity function key or by Setup Automatically adjust brightness. Luminous Display spends more Power since battery drain so use full brightness if and only if it requires.

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According to the condition, we always adjust our MacBook Pro or MacBook Air or useful Gadgets Display Brightness. It keeps dim during daytime even in a dark place we have should need full brightness for better visibility. But, you didn’t know the real way; to set/ Adjust Mac Display Brightness on MacOS High Sierra (10.13.2) or others. You can change Apple MacBook Air, Pro Brightness, using three methods either remotely, using the function key, or manually. Learn the recipe for Adjust Mac Display Brightness from the bottom given steps.

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Use Ever Full luminous At Night – Adjust Mac Display Brightness Big Sur, High Sierra, EI Capitan, Yosemite

Change Brightness Using Control center on Mac

In Latest macOS, Apple gives Control Center on the Mac screen just like iPhone and iPad. Without Move to your Mac settings and Shortcut, we can turn on and turn off some customer settings from mac menu. By Default Contol center is enabled at the top right corner of the mac screen, and we can add & Customize the control center on Mac at the Primary level. Adjust brightness is also comes in to control center.

Adjust Display Brightness on Mac

Adjust Display Brightness on Mac

Click on the Control center icon from the top Mac menu > And See the Display Brightness bar to change the screen brightness intercity using a mouse. if you are looking for a Keyboard shortcut then follow the next step. From the Display section, we can enable Dark mode and Night Shift.

Step to Set Brightness using the function key

Do anyone from given beneath:

  • If you’ve a Portable computer/ MacBook/ Apple Keyboard/ iMac/ iMac Pro – Press the F1 Key to decrease the brightness, and Press the F2 to increases the brightness.     
  • If you’ve a desktop Computer – Press the F14 Key to decrease the brightness, and Press the F15 to increases the brightness.     

Step to Auto Adjust Brightness on MacBook Air, MacBook Pro, and iMac

If your Mac has an ambient light sensor, though follow the beneath step

  • Step 1. Click on Apple Menu
  • Step 2. Now, System Preferences,
  • Step 3. Click Displays and then click on DisplayHow to Adjust Mac Display Brightness – OS X Yosemite
  • Step 4. At last, select “Automatically adjust brightness.”

1 Adjust Brightness on Mac

Note: if you don’t appear in the “Automatically adjust brightness” checkbox, then don’t worry you can do it manually. This way you can get from the bottom.

Get Here: How to Activate Dark Mode in macOS Mojave as well Enable Dark Mode using Keyboard Shortcut or Touchbar on Mac

Manually way to adjust brightness in OS X System Preferences 

  • Step 1. Click on Apple Menu
  • Step 2. Now, System Preferences,
  • Step 3. Click Displays and then click on Display
  • Step 4. Now, Drag the Brightness Slider to adjust your MacBook Air/ MacBook Pro/ iMac Brightness.How to decrease/ increase Brightness on MacBook Air or MacBook Pro

According to our information- you want to change display brightness but in some older Apple devices, in OS X V 10.10 or later, the slider to change brightness may no longer appear in the display pane of Display Preferences.

If, you’ve appeared Contrast slider in the Display pane of Display Preferences, its use to change the contrast of Display.

Even you can get more information regarding display brightness then check the document that came with your display.

MacBook Screen Dim and Cannot Change Brightness

Can’t change the MacBook brightness? Or MacBook screen dim automatically? No worries, there might be a small bug or you’ve altered the settings of the MacBook Keyboard, we’ll show you few easy tricks to fix the MacBook screen dim and cannot change its problem.

Solution 1: Disable Automatically Adjust Brightness

Have you enabled Auto-Brightness on MacBook? If yes, then disable the Automatically Adjust Brightness option from the System Preferences, sometimes, a corrupt software update could disturb the functionality and won’t let you increase the brightness.

  1. Click on the Apple menu.
  2. Select System Preferences.
  3. Select the Displays option and make sure the Automatically adjust brightness is unchecked.
  4. At the same time, you can drag the Brightness Slider up and down and see if it makes any change.

Solution 2: Brightness Keys Not Working on MacBook?

If there’s a problem with the keyboard keys then check the Keyboard Shortcut settings on Mac, at a time the keyboard keys can be assigned to only one function. Therefore, restoring the keyboard settings would be a wise choice here.

  1. Click on the Apple logo and choose System Preferences.
  2. Select the Keyboard.
  3. Again click on Keyboard
  4. And uncheck the F1, F2,

Solution 3: Reset SMC

SMC refers to the System Management Controller. Resetting the SMC could fix the problems with the Battery, Fans, Power, and other hardware issues.

MacBook with T2 Chip

  1. Power off the MacBook.
  2. Press and hold the Control + Option + Shift for 7 seconds.
  3. And then press the Power button along with other keys for more 7 seconds.
  4. Thereafter release all the four keys after 7 seconds.
  5. After a few seconds, you can turn on the MacBook by pressing the Power button as usual.

MacBook with Non-Removable Battery

  1. Power off the MacBook.
  2. Press and hold the Shift + Control + Option and Power button; all four keys for 10 seconds.
  3. Wait for few seconds and then turn on the MacBook like you always do.

MacBook with Removable Battery

  1. Turn Off the MacBook.
  2. Remove the battery.
  3. Refer to the correct guidelines to remove the battery otherwise visit the Apple Store.
  4. After removing the battery, hold down the Power button for 5 seconds.
  5. Put the Battery back in the MacBook.
  6. And turn on the MacBook.

Mac Desktops

  1. Power off the Mac and unplug the power cable.
  2. After 15 seconds plug the Power Cord back in.
  3. Again wait for 5 seconds and press the Power button to turn on Mac.

How Do I Adjust the Brightness on My External Monitor Mac

While you cannot control the Brightness of the External Monitor from the System Preferences of the MacBook, however, there are few External Monitors that support this function. But in most cases, the easiest way is to use the keys that are embedded in the external monitor to adjust the brightness. Furthermore, it depends on how the external monitor is connected with Mac or MacBook, using the HDMI converter won’t work here, here Mini DisplayPort, Thunderbolt might work here. In short, if you’re convenient with the hardware keys of an external monitor to adjust the brightness, it’s the best option.

Alternatively, download the QuickShade App on your Mac, to control the brightness of the external monitor.

Mac Brightness Shortcut

It’s tedious to open the System Preference every now and then to adjust the Brightness on Mac. Rather use the keyboard shortcut to increase and decrease the brightness on Mac. Here’s how to Turn up brightness on Mac.

Press and hold the Shift + Option and then F1 to decrease and F2 to increase the brightness on Mac.

You’ll notice a Sun icon on the F1 and F2 keys indicating the brightness symbol.

Mac Brightness Not Working

Brightness not working on macOS Big Sur, Catalina, or earlier on Mac, is a crucial problem, over brighter or dark display won’t let you focus on work. All you can do is Restart Mac, Disable Auto-Brightness, Reset SMC and if neither of them works, then contact Apple Support.

I’ve listed these solutions in detail, look at the above section to resolve it.

Mac Brightness Keys Not Working

Usually, the F1 is used to lower down the brightness and F2 increases the brightness of the Mac unless someone has changed these settings from System Preference.

  1. Visit the System Preferences and select Keyboard.
  2. Select Keyboard
  3. Deselect Use F1, F2,
  4. And restart the Mac.
  5. If it doesn’t work, then reset SMC of the Mac, I’ve mentioned the steps to reset SMC above.

MacBook Pro Increase Brightness without Touch Bar

The System Preferences have the option to adjust the brightness of the MacBook, there you won’t need to use the Touch Bar to adjust the brightness.

  1. Click on the Apple logo and select System Preferences.
  2. Select Display.
  3. Drag the brightness slider to increase or decrease the brightness.

Give your reply on this tutorial to Adjust Mac Display Brightness or increases/ decrease Brightness on Apple MacBook Air, MacBook Pro, and iMac. How much help you?

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Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]

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