I have solved Audio problem Here is a short description how: Insert AppleHDA.kext in S/L/E restart boot in Recovery mode start terminal and type - CSRUTIL DISABLE restart start audio_realtekALC-110_v1.0h.command answer with y (if ask for HDMI I answered n and wait to process to finish) restart setup in Configuration/Audio/Output -> Internal Speakers -it should be there Check if sound is working And here is a full explanation In attachment are the files that I have used. Problems with USB3.0 and GraphicDriver/Clover boot still remain. Also I don't know why once I got black boot screen with Clover Icons Boot1.jpg and other time this ugly Boot2.jpg. It does not affect the boot process. With matts fix I have managed to install USB3.0, he has explained everything excellent and I have just followed his post. And somehow, after I have successfully installed Audio I have no problems with booting system, I have shut it down for about 20 times till now and it starts every time normaly. I hope that everything is solved now.