The features on macOS tend to work almost flawlessly if youre using Apple manufactured hardware but anything that hasnt been manufactured by Apple, or that doesnt carry its stamp of approval may, or may not work with all of macOS features.

Night Shift is a feature that was added a while ago to reduce bluewhite light on the screen by tinting it a warm color.

Its a great feature but it seems that it doesnt always work with external monitors.

Heres how you can fix Night Shift not working on external monitors.

It is highly unlikely that it is a hardware related problem so unless you have an exceptionally old, square monitor, Night Shift should work on your external monitors.

When you connect the external monitor again, it should be tinted a warmer color.

If theyre damaged, they may be interfering with the feature.

This often leads to Night Shift being triggered on the external monitor.

Once Night Shift starts working with the external monitor, you can run your MacBook with the lid open if you want.

It can basically turn on Night Shift without you having to go through the System Preferences app and it works great with external monitors.

Allow it to tint your external monitor and let it run for a while.

This will likely fix Night Shift not working with the external monitor.

You can remove the app if you want but it does give you a great, quick way to manage the tint of the screen directly from the menu bar so theres no harm keeping it around.

Night Shift For Mac