I am Really Stumped on this one. I have 2 working Hackintoshes. I am trying to do this build so my father can try Mac OS. Using a Gigabyte GA-H77N with an i5 Sandybridge. NO Graphics Card. On the Bench Stripped. I cannot get it to boot into the installer. Funny thing is, I had this set up working a while back, but for the life of me I can't remember what I did. I have tried Yosemite, El Capitan, Sierra. Tried every USB port, reset the CMOS, XHCI enabled, VT-D Disabled/enabled. I either get the prohibited sign or it just crashes. About to give up. Let me know if anyone has any ideas.