hi i updated hackintosh to 10.12.6
brightness keys are working by adding this
# select DELL/WN09 profile in VoodooPS2Keyboard Info.plist
into method label _DSM parent_label PS2K remove_entry;
into device label PS2K insert
begin
Method (_DSM, 4, NotSerialized)\n
{\n
If (LEqual (Arg2, Zero)) { Return (Buffer() { 0x03 } ) }\n
Return (Package()\n
{\n
"RM,oem-id", "DELL",\n
"RM,oem-table-id", "WN09a",\n
})\n
}\n
end;