Catalina Display Backlight Control Panel
Catalina hackintosh MacWannaBe

How To Fix Low Backlight Level with BacklightFixup.kext

Clover boot loader seems NOT to handle Lilu.kext, WhateverGreen.kext and SSDT-PNLF.aml well when it comes to setting the backlight level on Hackintosh while OpenCore boot loader sets the maximum brightness every time. In the case of low backlight with Clover, we can use and its SSDT-PNLF.aml to set the brightness to maximum. 

Haswell HP Envy X360 Yosemite OSX

How To Make Brightness Keys Work In Yosemite 10.10.4 On HP Haswell Laptops

A perfect MacBookAir 6,2 should have backlight brightness controlled by designated keys on the Windows Keyboards, in our HP X360 and Envy 4-1117nr cases, they’re F2 & F3. Thanks to Rehabman tutoring me through the process on Tonymacx86.com, I got the brightness keys F2 & F3 working as in Windows on my Yosemite 10.10.4.