Due to difference in real mac and hackintosh keyboard many hackintosh system will miss the brightness control through Fn+ n Keys. I hope you've now working brightness, that you can check it from SystemPrefs -> Displays. If you can't find slider then you first need to make brightness work first then only after remapping keyboard for it.
noobsplanet.com
Reboot your system and you should see slider in SysPrefs->Displays. Now before following this guide, you should has at least basic knowledge of how DSDT working, edits and use. You can see the very basic of DSDT here :
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Open MaciASL and click on add sources and set source as
After you have determined which methods correspond to the brightness keys, you can patch the methods like below but be sure to replace the keys
Assuming _Q16 is brightness decrease, and _Q17 is for brightness increase.
That's it. Compile and save this file as ACPI Language and don't forget to place patched DSDT into
Thank You!! If you guys have any problem then let me know.

Majove - Enable and Control Brightness | Backlight for Mojave
Enable and Control Brightness | Backlight for Mojave Previous guide may not working for macOS Mojave.If you use Mojave, follow this guide to enable and control Brightness|Backlight for laptop/desktop. NOTE: Before doing this you may need to Patch DSDT and SSDT Read and Follow this...

Reboot your system and you should see slider in SysPrefs->Displays. Now before following this guide, you should has at least basic knowledge of how DSDT working, edits and use. You can see the very basic of DSDT here :

How To Disable Unsupported Nvidia or AMD Radeon Graphics in hackintosh for better stability?
Hello Hackintosh users, Today I will you in this guide how you can disable your discrete graphics in your hackintosh machine. Before following this guide make sure proper SSDT.aml is in your /Clover/ACPI/patched/ , If you don't have yet created your SSDT one, then you can create here with...

Open MaciASL and click on add sources and set source as
http://raw.github.com/RehabMan/OS-X-ACPI-Debug/master
then apply "OS Check Fix", "Add DSDT Debug Methods" and apply "Instrument EC Queries"
then reboot your system. After reboot open console.app from Applications -> console.app and system.log and press the Fn+brightness keys on the keyboard to detect.After you have determined which methods correspond to the brightness keys, you can patch the methods like below but be sure to replace the keys
Assuming _Q16 is brightness decrease, and _Q17 is for brightness increase.
Remapping Brightness Keys:
into method label _Q16 replace_content
begin
// Brightness Down\n
Notify(\_SB.PCI0.LPCB.PS2K, 0x0405)\n
end;
into method label _Q17 replace_content
begin
// Brightness Up\n
Notify(\_SB.PCI0.LPCB.PS2K, 0x0406)\n
end;
Clover/ACPI/patched/
.Thank You!! If you guys have any problem then let me know.