https://bugs.freedesktop.org/show_bug.cgi?id=26891

--- Comment #19 from Alex Deucher agd5f@yahoo.com 2012-04-10 06:14:26 PDT --- IIRC, Matthew Garret had a patch to fetch the vbios from EFI during early boot. Also, there is a way to fetch the vbios on legacy free EFI systems via ACPI, however, I don't know if apple uses it or not.