As the title says, i have Toshiba Satellite C650-15h notebook, and I want to install mac os. Now, i think i did everything right, but the booting freezes with @USBF: USBEHCI Unable to initialize UIM" thing

Now, i have some questions, as I am new to this thing
1. What should i put in bios for sata mode? ACHI or Compatibility?
2. Do I need to turn off the usb legacy support because of this error message? (I read that somewhere)
3. Can anyone please help me?

Thanks in advance