Ambient Light Sensor Auto-Adjustment Issue on 16" MacBook Pro M4 Pro

bryce-allwin wrote:

Device Specifications:

16" MacBook Pro

M4 Pro Chip

48GB RAM

1TB SSD Storage

macOS Sequoia 15.2

Has anyone experienced issues with the ambient light sensor not adjusting the display brightness to match the surrounding lighting conditions on the 16" MacBook Pro M4 Pro? On iOS devices like the iPhone or iPad, toggling the "Automatically Adjust Brightness" feature can prompt an immediate response. However, this functionality seems unresponsive on the MacBook Pro.

Technical Question:

How can I force the MacBook Pro to adjust the screen brightness immediately based on ambient light?

When manually adjusting brightness using the keyboard, how long does the manual setting override the automatic adjustment?

A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies

Login and test. Reboot as normal and test. Caches get rebuilt automatically.

Try turning off your "Automatic" and adjust the brightness manually— it is immediate.