Comment 125 for bug 774089

Krzysztof, I disagree. This appears to be model-dependent - it may work like that for you, but I'd be a lot more comfortable shipping Ubuntu in such a way that it installs in BIOS mode on Macs, at least until a lot more work has been done. Furthermore, there have been no changes that I'm aware of that would have fixed the booting problem that prompted the creation of the amd64+mac images (although Matthew Garrett's work points the way to getting rid of those images eventually); if you aren't seeing that problem, then chances are that you never had an affected system in the first place.

The intent was always to install in BIOS mode on Macs. This didn't happen because the code that was supposed to detect Macs broke when booted in EFI mode. I'm pretty sure that fixing the detection code will avoid this bug, and I'm working on that, thanks to testing assistance from Alan Pope.