Hi there, I've got a small question: In clover directory we've EmuVariableUEFI-64.efi. As I think it uses for NVRAM emulation. BUT with this file NVRAM reset after reboot. If you delete this file all works fine. So, that's the question: for what purposes this file are there?
1) you should set timeout to 1 or 0 and set your default bool volume to LABLE of volume, where OS X is installed.
2) ... 3) maybe it can be fixed by deleting EmuVariableUEFI-64.efi from clover directory