Hackintosh Brightness Control v0.2
With hackintosh brightness control you can control your screen brightness of your desktop computer by pressing F1 (decreasing brightness) or F2 (increasing brightness) keys.
How to install:
1) copy hackintoshBrightness.app to your application folder
2) Run hackintoshBrightness.app from your application folder and give it access from accessibility (located in System Preferences -> Security & Privacy -> Accessibility)
3) Add hackintoshBrightness.app on login items (located in System Preferences -> Users & Groups -> Login items)
4) Restart your hack.
Hackintosh Brightness Control works only on monitors connected with hdmi/dvi cables and only with few AMD/NVIDIA gpus.
Tested on Yosemite 10.10 with AMD Radeon R9 270.
Hackintosh brightness uses DDC/IC source created by Jonathan Taylor for brightness control and some code from PHPdev32 for the gui.