Turns out that a VirtualBox EFI virtual machine CAN boot Clover with my Mac drive. I don't know what that means. And it is certainly a broken, clover, with no config file read correctly. I think this because the theme is "embedded" instead of any of the ones I have picked, and none of the other options I set in the condif work either.
It is so frustrating that Clover USED to work fine on the UD7. THIS NOT SUPPOSED TO BE THE HARD PART.