Turn your Mac keyboard’s backlighting on or off
If your Mac laptop has a backlit keyboard, you can manually adjust the level of backlighting or turn it off, or set options to do so automatically.
Manually adjust keyboard backlighting or turn it off
Do one of the following:
On all Mac computers: Choose Apple menu
in the sidebar (you may need to scroll down). Drag the “Keyboard brightness” slider to adjust the brightness. Drag it all the way to the left to turn off backlighting.If your Mac has keyboard brightness keys: On the keyboard, press the increase brightness key
or the decrease brightness key 
. To turn off backlighting, keep pressing .If your Mac has a Touch Bar: In the Touch Bar, expand the Control Strip, then tap
or . To turn off backlighting, touch and hold .If you added keyboard brightness to the menu bar: Click
or in the menu bar, then drag the slider to increase or decrease the brightness. If you don’t see or , you can add it. See Customise Control Centre.If you added keyboard brightness to Control Centre: Click
in the menu bar, click , then drag the slider to increase or decrease the brightness. If you don’t see , you can add it. See Customise Control Centre.
Automatically adjust backlighting in low light conditions
Choose Apple menu
Turn on “Adjust keyboard brightness in low light”.
Automatically turn backlighting off after a period of inactivity
Choose Apple menu
Click the pop-up menu next to “Turn keyboard backlight off after inactivity”, then choose a time.
Tip: The light sensor is located at the top of your computer near the camera; make sure that area isn’t covered when you use your Mac in low light conditions.