Chosen Solution
My MacBook is blocking me from using backlight and volume. Please Help!
There are settings which can get messed up in either NVRAM or SMC. I would start off resetting them to see if that fixes things (try doing NVRAM first) Reset NVRAM or PRAM on your MacHow to reset the SMC of your Mac
I would like to know what it means to be ‘blocking you’ If it’s not letting you put the brightness and volume up past a certain threshold then a Reinstall of MacOS will be required.