Bug#412682: Info received (Bug#412682: Netinst CD-image locks keyboard at boot on Macbook (Intel))
> As far as I know there is no way to enable Legacy USB keyboard support
> in a Macbook. Those nifty little laptops don't have a BIOS but use EFI
> As I've already indicated, using EFI tools like rEFIT don't seem to
> affect the problem previously described at all.
The keyboard of Intel MacBooks does not seem to be supported during
isolinux boots from CD. No idea if this can be fixed in syslinux or that
the real cause lies elsewhere.