With tens of millions of Mac users spanning the globe chances are good that someone else out there has the same problem you have with your Mac. Problem? Everyone is different, but I visit my Mac at all hours of the day and night. The Mac’s screen during the day is just fine. At night it’s just a little to bright for my tired old eyes to adjust.
Yes, I can adjust the screen’s brightness with a few keystrokes, but then I have to adjust them again when the ambient light of the room changes later in the day. Light is often different morning to noon to afternoon to night.
Add the free f.lux utility to your Mac and let it handle the screen’s adjustments based upon the actual time of the day. Warmer at night. More like sunlight during the day.
Select the light level you want at night, then repeat for daytime. Add your location so flux knows when sunrise and sunset occur. Set the transition from one screen lighting level to another with the radio buttons.
Click Preview to see the changes. Click Done and you’re done. f.lux will adjust the Mac’s screen based upon the time of day. The only issue I’ve run into has to do with daytime weather changes where f.lux cannot tell the difference between a dark and cloudy day vs. a mostly sunny day.
Otherwise, it works and it’s free.