I saw that someone made the Marvell Yukon NIC on an Intel Mac mini work by activating ACPI in the kernel using NetBSD (even with a working second CPU core, but of course that's unnecessary as long as the NIC doesn't work...), so I tried the same with OpenBSD, unfortunately with no success so far.
I forgot to link that, sorry: http://mail-index.netbsd.org/port-i386/2006/10/07/0000.html Tas.

