Hi, Evo*! Thank you very much for your contribution! Without you I probably would have never got eGPU working concurrently with internal screen. However, I have a few issues. Macbook keyboard and trackpad don`t work with your modified EFI partition (except for power button). External keyboard and mouse work fine along with Internal (with hd5000) and external screens (with eGPU). Since you use "apple_set_os" parameter, it might make macbook keyboard and trackpad not working in windows, because macbook thinks that it boots osx and it loads os x drivers for keyboard and trackpad. Is there any way to fix that? Thank you My setup: MBA 13-inch mid 2013 ASUS gtx 760 EVGA PSU 500W Windows 8.1