stuck at apple

Motherboard Z370 AORUS Gaming 7 Cpu : Intel 8700K Ram:Crucial - Ballistix Sport LT 16GB (2 x 8GB) DDR4-2400 Memory Memory :Samsung 970 EVO 250GB - NVMe PCIe M.2 2280 SSD I installed before the high sierra but i had a problem with the booting i couldn't use the operate system without the usb ...

Im having trouble switching back to onboard graphics on my setup. It keeps sticking on the apple everytime it boots. It would boot fine when i was on Nvidia drivers with 750 Ti card. I cant get it to boot off intel graphics for the life of me. I get same results when booting in safe mode -x...

This is my first hackintosh and i am dual booting windows 8.1 and OSX Yosemite. windows and mac have thier own partitions i am not installing one over the other but when i try and boot to the mac installer it sits at the apple logo and the bar at 0 and it doesnt move. i booted using the 2 -...