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

--- Comment #35 from Alex Deucher agd5f@yahoo.com 2012-08-30 14:25:55 UTC --- (In reply to comment #34)

Alex, Please see the DSDT table from a Macbook Pro booted in EFI mode. Maybe it will give you some ideas for extracting the VBIOS.

Sorry, I'm not really much of an ACPI or Mac expert. I don't see anything relevant. IIRC, the vbios on macs is only available in boot services so it's likely gone by the time the OS is loaded. You'd probably need the boot loader to grab it and store a copy somewhere so the OS can access it when it loads. I'm not sure how Apple does it. Someone more familiar with Macs may have some ideas.