On Apr 29 14:12:24, open...@2al.ch wrote:
> I have an Macmini2,1 from mid 2007 with similar specs [1] and presumably
> similar firmware. I tested a whole lot of combinations for booting it and
> came to the following conclusion:
>
> To boot OpenBSD you have to use the internal SATA or ATA devices.
>
> That means you need to use the CD/DVD-drive as installation medium
> (installXX.iso). Alternatively you can replace the CD/DVD-drive with a
> hard drive and use that as installation medium.
>
> Booting from USB only works for MacOS X.
>
> EFI-Booting (32-bit on my setup) works fine. To speed up boot time after
> the installation of OpenBSD, use the Mac-proprietary bless(1) command [2]
> once (by booting some MacOS or MacOS installation medium). It writes
> your preferred boot volume into NV-RAM, thus skips the boot volume
> search (grey boot screen after turning the machine on) and continues
> booting OpenBSD immediately.
Just for completeness: when you boot into macOS again,
it will apparently bless the macOS partition again;
so you have to bless OpenBSD again
before rebooting from macOS.
Jan
