Spencer:
>> sajolida:
>> I see that you changed the background from gray to
>> black. Was this on purpose?
>
> Within the current Mac Boot ROM version (2015-001) [0], there are two
> background colors:
>
> - Gray = Old (Pre Mavericks/Yosemite)
> - Black = New (Post Mavericks/Yosemite)
>
> I am unable to confirm anything more specific :(
That's very specific already!
> It is up to you which you will use but they are both correct.
I'll stick to the black one then to me more future-proof as it comes
from the new versions of Os X.
Thanks a lot for working on this, you saved me a bunch of headache!