I hit the same thing recently, but that's basically what Wikidata was founded for - and I'm sure it has the latest version of macOS. It's really easy to fetch Wikidata data using the Wikidata API (my example: https://gitlab.com/Flockademic/whereisscihub/blob/master/ind... )
If you're just interested in a single value, using the SPARQL endpoint[0] is probably still more simple, since you don't have to filter out deprecated statements, for example.
I have a lot of goodwill toward wikimedia, but trying to use wiki data made me question my life choices. It doesn’t help that the official API endpoint Times out for anything mildly complicated. (As in a simple aggravation or sorting in the query)
https://en.wikipedia.org/wiki/MacOS has a footnote after the build number. That led me to https://developer.apple.com/news/releases/. I guess that doesn’t do semantic markup, and I didn’t look at the html at all, but it looks like it could provide you what you want fairly easily (likely not 100% reliably if automated, but chances are Wikipedia‘s somehow keeps up to date involves humans, too)
