[cflewis]

I think the statute of limitations on “confusing name” when Mac OS Carbon was removed from OS X 10 years ago has passed.

[oneplane]

Since those old operating systems are now vintage or retro, there have been a few people porting things like Rust, Go and Swift to older Mac OS versions (the ones that use the Toolbox ROM) which was also in the news here.

There is of course no 'registry of allowed names that have aged-out' but there are probably other creative names one could come up with.

[morelisp]

Carbon was removed two years ago.

[astrange]

Well, the API was. There's still bits of it internally driving the menu and event systems, and a lot of app/icon/Finder behaviors.

[olliej]

Yeah, I was confused by the name carbon, but am able to recognize that what I think of by default is not relevant anymore.