Issue Description
Screen brightness does not change, dims automatically, or remains too dark.
Common Causes
- Ambient light sensor behavior
- Power-saving settings
- Display configuration errors
Step-by-Step Solution
Step 1: Disable Automatic Brightness
- System Settings → Displays
- Disable Automatically adjust brightness
Step 2: Adjust Brightness Manually
- Use Control Center or keyboard keys
Step 3: Reset NVRAM (Intel Macs)
- Hold Option + Command + P + R for 20 seconds
Step 4: Update macOS
- Install latest updates
Explore Further
- Test external display brightness
Prevention & Best Practices
Avoid using third-party display tools.