Q1: Why did Apple remove physical backlight keys from modern MacBook Pros?
Apple repurposed the F5 and F6 keys to provide direct hardware access to higher-frequency system functions, including Spotlight search, Dictation, and Focus modes, relocating keyboard brightness controls to macOS Control Center.
Q2: How do I keep my MacBook Pro keyboard backlight on permanently?
Navigate to System Settings > Keyboard, disable "Adjust keyboard brightness automatically," and set "Turn keyboard backlight off after inactivity" to "Never." Note that keeping the backlighting continuously active will reduce battery performance.
Q3: Why does my keyboard brightness slider appear locked or grayed out?
If the built-in ambient light sensor detects a brightly lit environment, macOS disables manual backlight adjustments. Shielding the sensor near the top camera module re-enables the slider for manual adjustment.
