There are only 2 ways to run AmigaOS4
1. Buy an AmigaOne. Prices vary but expect to pay at least €500
2. Buy a BlizzardPPC (PPC603e - for Amiga 1200) or CyberstormPPC (PPC604e - for A3000/A4000).
Currently there are no other options. These PPC cards from Elbox have been announced years ago and will very probably never see the light of day.
The only (very small) hope that I have is that the rights to OS4 will go to decent people so that OS4 can be ported to common PPC machines. AFAIK, AmigaOS4 is already running on a Mac Mini so there is still hope in some way. But don't be too eager for that to happen anytime soon.
Yes, it's sad but this is all there is...
