![]() These keys are typically located at the top of the keyboard. I'm attaching screenshots of what the Control Center and System Preferences show. Here’s how you can do it: Press the Function (Fn) key + F1 to decrease brightness or the Function (Fn) key + F2 to increase brightness. I even decided to try out an OpenCore Legacy Patcher Monterey installer I had sitting around to see if forcing a newer os install might refresh something, but the same problem persists.Unplugged and reseated the display cables to the logic board.Tried that again, this time also deleting the recovery partition if my memory is correct - this was in December.Reformatted the SSD and performed a clean install downgrade back to an older version of Big Sur from USB.On a Mac desktop PC, look at the top-right corner of your keyboard. The display brightness isn't adjustable in any alternate boot mode either - safe mode, recovery mode, or even when booted into an installer from a USB drive. The F1 and F2 keys will decrease and increase your brightness. ![]() Attempting terminal commands to change the brightness also produced no result. The keyboard brightness controls don't have any effect, the brightness slider in the Control Center is grayed out, and there is no brightness control at all in System Preferences. No auto-adjusted brightness, disabled screen temperature. I only noticed this a few months after upgrading to Catalina, its been ongoing ever since. The screen appears about 2-3 dots dimmer on max brightness after waking from sleep for more than 30 minutes. This question concerns my mid-2014 2.2GHz Macbook Pro 11,2Īt some point in Novemer last year I updated the computer to Big Sur 11.6 from a previous version of Big Sur, and immediately noticed that I could no longer control the screen brightness via any method - keyboard, Control Center, System Preferences, or Terminal - and that the brightness was stuck at around 50-75%. Screen on Max Brightness Appears Slightly Dim After Sleeping, MacBook Pro 2015.
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