# Fixing Backlight (SSDT-PNLF) * [What this SSDT does](#what-this-ssdt-does) * [Methods to make this SSDT](#methods-to-make-this-ssdt) ## What this SSDT does The purpose of this SSDT is to create a PNLF device for macOS to play with, specifically one with a hardware ID of `APP0002`. Luckily WhateverGreen will handle the rest of the work for us. ## Methods to make this SSDT For the backlight fix, there are 2 methods you can choose from: * [Prebuilt](/Laptops/backlight-methods/prebuilt.md) * [Manual](/Laptops/backlight-methods/manual.md)