For most Mac users, the fastest way to change screen luminosity is through dedicated hardware keys.
QuickBrightness
To make this feel like a premium Apple product rather than a hacky utility: brightness shortcut mac
If your MacBook Pro features a , the brightness controls are integrated into the Control Strip on the right side. Mac keyboard shortcuts - Apple Support (CA) For most Mac users, the fastest way to
→ Enable "Control your display with keyboard" → Use: For most Mac users
Stop playing the "brightness limbo" every time you switch apps. Your Mac knows what time it is—now let it know what you’re doing.
Much like the screen, holding Option + Shift + Keyboard Brightness Up/Down allows for more precise control over the backlight level.