I have a strange problem when I installed the 3.0 with a clear installation and the USB Poseidon and I have installed the 2.7 as the first time, now with my MorphOS2.7 and the main partition of 2GB because the 2.7 did it of 700MB, well, with the 2.7 instead of to do a clear installation I did the update to 3.1 and except to the battery that now I haven't the date save, the MorphOS 3.1 hasn't problems in my Mac Mini, but I have installed in exclusive I don't have other OS in this Mac Mini, ni MAC OS netiher Linux, I hope help you, perhaps install first the 2.7 and update, in my case the Poseidon problems have dissappered but with a clear installation I don't know if now I'm speak to merry.