This is fantastic. To me, this is one of the greatest side-effects of agentic coding; adding new functionality to vintage, abandoned or obsolete hardware. It gives me hope for a solarpunk future where e-waste gets a more functional second life.
Cool! I've been wondering for some time if a good low-distraction but pleasant environment could be an old Mac OS on a (good looking) Hackintosh. The UI was baked with UX research at least.
Also, the branding was "Mac OS 9".