Click and drag the Brightness slider to the left to decrease brightness or to the right to increase screen brightness.To do so, click the Apple icon in the top-left corner. You also have the option to change screen brightness in System Preferences.Press the F2 key to increase the brightness of your screen.Press the F1 key to decrease the brightness of your screen.Now, here's how to increase or decrease your Mac screen brightness level: For more handy Mac tips, sign up for our free Tip of the Day Newsletter. It's important to note that for the keyboard shortcut, some Mac computers have an increase brightness key and a decrease brightness key. Others have a touch-sensitive Control Strip that includes the same functions. How to Make Computer Screen Brighter or Dimmer on Macīelow, we'll cover how to adjust your Mac screen brightness by using your keyboard and by accessing System Preferences. Dim your screen to be gentler on your eyes if you’re in a dark environment or are planning to go to sleep soon.Increase your Mac screen brightness when you’re going to watch a movie, play a game, or are working outside.I bought my MacBook second hand, but the previous owner assures me that it was never serviced outside of official Apple support. It seems like the internal display is treated by Big Sur like an external monitor, where the OS brightness controls are usually not available.īy the way, I've seen reports of this happening with non-Apple display replacement parts.

I also asked to Apple support but up to now they were not able to suggest more than a reinstall, which I now know is useless: I performed a clean install of Big Sur on an external SDD and the same happens, while a clean install of Catalina on the same external drive works perfectly (i.e. I tried every possible solution found on the web: reset NVRAM and SMC, force shutdown, safe mode, change display scale. Hi! I have exactly the same problem on my MacBook Pro 15' mid-2014.Īfter much time, a couple of days ago I finally decided to upgrade from Catalina to Big Sur (11.6.1), and after the upgrade I had this issue where the display brightness is locked at an intermediate value and cannot be changed, because every brightness control does not work or is unavailable at all, as in the first post of this thread.

Adjust brightness mac os