Table of Contents
Owners of Macs with built-in screens probably know that they can Disable Auto Brightness on Mac, Windows, Android and iPhone of the screen using the function keys on the keyboard, System Preferences, or a third-party app. But you may have also noticed that your Mac’s screen automatically changes the brightness level.
You can manually get around this problem by turning off auto-brightness completely. With the hotkeys on a Mac, you can change the brightness of an Apple-made external display. So, if you have an Apple keyboard, you have keys that let you change the brightness. This is how you can turn off auto-brightness on a Mac.
Steps to Disable Auto Brightness on Mac
- Click on the Apple Menu at the upper-left corner of your screen and choose System Preferences.
- Choose the Displays pane.
- Under the Display tab there, deselect the Automatically adjust brightness option
- Once you uncheck that box, your screen won’t get brighter or darker on its own. You can change this setting by hand, of course. You can use the “Brightness” slider in this same System Preferences > Displays > Display pane, or you can use the appropriate function keys (or the Touch Bar) on your keyboard. Usually, these function keys are F1 and F2, but you can tell because they have suns on them.
Turn Off Auto Brightness on iPhone
- First, open the “Settings” app from the home screen.
- Here’s where Apple throws the curveball. You actually want to go to “Accessibility,” not the Display settings.
- Now, tap the “Display & Text Size” category within Accessibility.
- Scroll down to the bottom and toggle off the switch for “Auto–Brightness.”
How to Disable Auto Brightness on Windows
- When you’re ready to disable auto brightness, first open Windows Settings by pressing Windows+i. Or you can right-click the Start button and select “Settings” in the list.
- When the Settings app opens, in Windows 10, click “System,” then select “Display” in the sidebar. In Windows 11, click “System” in the sidebar, then select “Display.”
- Under the “Brightness and Color” section in Windows 10, look below the Brightness slider and uncheck the box beside “Automatically adjust contrast based on the displayed content to help improve battery” or “Change brightness automatically when lighting changes.” If you see both options, uncheck both.
- In Windows 11, click small arrow beside the “Brightness” slider to expand a small menu, then uncheck “Help improve battery by optimizing the content shown and brightness.”
- If you see “Change brightness automatically when lighting changes,” uncheck that as well.
How to Turn Off Auto-Brightness on Android
- Open your device Settings.
- Tap on Display.
- Go to Auto-brightness and tap the button to disable it.
Some devices may have slightly different UI. In that case, you will need to go to Display > Brightness-level > Auto-brightness. Once there, simply tap to disable like normal.
FAQ
Why can’t i disable adaptive brightness?
The current power plan has Adaptive Brightness turned on – Even if you turned off adaptive brightness in the past, you might be on a different power plan where it is still turned on. In this case, you can fix the problem by turning off adaptive brightness for all of your power plans.
Why does my iPhone screen go dim even when the auto brightness is off?
Even if you’ve turned off Auto-Brightness and Night Shift on your iPhone and it’s still dimming on its own, it could be because it’s too hot. This is a built-in feature from Apple that protects the phone’s internal parts from damage caused by heat. After all, brightness causes heat to build up.
How do I stop my computer from changing brightness Mac?
- If your Mac has an ambient light sensor, choose Apple menu > System Settings, then click Displays in the sidebar. (You may need to scroll down.) Open Displays settings for me.
- Turn on “Automatically adjust brightness” on the right.