In this guide I provide a way to give 100% optimus internal LCD mode on a iGPU-only equipped Macbooks (not GT650M/GT750M/HD6750M MBP) on every boot. No special hardware interaction is necessary! Discovered as part of my implementation at [GUIDE] 2013 15" Macbook Pro Iris + GTX970@16Gbps-TB2 (AKiTiO Thunder2) + Win8.1/OSX THIS GUIDE IS INTENDED FOR WINDOWS 8.1 UEFI ONLY! PLEASE PROCEED AT YOUR OWN RISK! All Commands are from OS X Yosemite 1. Obtain the EFI Disk Indentifier Open OS X Termin