Step 4: Close the window and try changing the display brightness using the F1 and F2 keys. Step 3: Under the Keyboard tab, check if ‘Use F1 and F2 keys as standard function keys’ is unchecked or not.

But if they have been made to be used as Standard Function Keys, you won’t be able to use them for changing the brightness levels. The F1 and F2 Function Keys on your Mac keyboard are meant to change the display brightness manually. You can also try changing the display brightness manually from the slider. Step 3: Check whether the option of ‘Automatically Adjust Brightness’ is enabled. Step 2: Click on Display at the bottom-left corner. Step 1: Press Command + Spacebar on open Spotlight Search, type System Preferences, and press Return. If display brightness is not working on your Mac, here’s how you can check this setting to begin fixing the issue. Your Mac can automatically manage the display brightness depending on the your environment’s lighting.

1. Check Automatic Display Brightness Settings If you are facing the same issue, here are the best ways to fix the display brightness not working on Mac. There are moments when you may not change the display brightness. Enable the “Slightly dim the display while on battery power” checkbox under the Battery tab to make your Mac’s screen dimmer when on battery power, or uncheck it to prevent your Mac from dimming the display automatically. Just remember that unchecking it might drain your battery faster.You might face issues with display brightness while using your Mac outside or in a restaurant. To enable or disable this option, open the System Preferences window and click the “Energy Saver” icon. This helps increase your MacBook’s battery life. Your MacBook can automatically change its screen brightness when you’re on battery power, dimming your display when you’re on battery and making it brighter when you’re plugged in. RELATED: How to Increase Your MacBook's Battery Life How to Automatically Dim the Display When You’re Not Plugged In You may find dedicated “brightness up” and “brightness down” buttons, or you may have to press a “menu” or “options” button and locate this option in an on-screen menu. Look for physical buttons on the display itself, often located near the power button. If you’re using a third-party display, you’ll need to adjust the brightness on the display.

Auto adjust brightness mac