OS for Natami? There seem to be a few choices here. Commodore based Workbench; ie a heavily patched 3.1. Or perhaps Hyperion based OS3.9 also heavily patched. Or Aros 68K (would have to be completely cleaned up and finished). Realistically, either 3.1 or 3.9 are the best choices out of the gate unless a large effort is being made on a Natami tuned Aros 68K that I do not know about.