I have a Lenovo g50 80 core i3 5005u and dual graphic intel hd and amd(ati) radeon. I didn't worked with MAC at least one time till now. But i need a MAC to run a react-native ios simulation. and i've no money to buy a MAC. ( It is super expensive in IRAN) I got download Sierra.raw and created a usb bootable disk with win32-diskmanager and I did boot up the laptop in EFI and clover will shown (3763 in right down corner (is it version?)). So When i do "Boot MAC OS X from Install macOS Sierra" which is a question marked icon,it will stuck exactly like the screen in first post. There's no folder named EFI on usb disk and i don't know how to get right configuration. I'm dummy with MAC.