loading operating system

Hi guys! Sorry for my bad English, I'm French. I have a problem when I boot on the USB key with El Capitan or Yosemite. My motherboard is Gigabyte P55A-UD3R, and when I boot on the USB key, my BIOS freezes to "Loading operating system". I've tested with two different USB keys, and on four...

First and foremost, many thanks to the users & contributors of this site. I've loved my Hack for several years ... Up until this past week, I had a near-perfect Hackintosh, going on nearly 5 years old. I have a fairly simple set-up, with the OS running on a 120GB SSD, then a 2TB (formatted...

I successfully installed 10.9 on my HDD from a UniBeast drive, but when I try to boot from the HDD I get stuck at black "Loading Operating System..." screen. I uploaded all my BIOS settings in the pics. Would appreciate any input. Thanks :) Stuff: GA-H67M-D2-B3 3.29 GHz Intel Core i3 4...

Hey all, I wrote a lot, but please if you can help me this hasn't happened to anyone else as far as i can see on the internet. PROBLEMS: BIOS CANT FIND OPERATING SYSTEM, CAN NOT REINSTALL OPERATING SYSTEM. what happened below= i'm not new to the hackintosh world but i've just encountered...