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Their nomenclature seems to be major, minor, patch.

(macOS 10.x is arguably a special case. Technically, 10.1 Puma, …, 10.5 Leopard, …, 10.10 Yosemite, etc. were "minor", but that clearly wasn't the intended message.

But, with macOS 12.x, 12.0 is the major release. 12.1, 12.2 and 12.3 are clearly minor.)
They likely thought removing an out of date scripting language after more than 10 years was a minor change.
 
Apple is not really working towards being semver friendly this week. Removing Python 2.7 in a dot release and also making older cloud storage apps read-only. I don't care they do this (it's for the greater good), but they shouldn't do it in a point release, especially ones you can't skip as they contain security fixes.

Isn't removing Python 2.7 (which is no longer supported or receiving security updates) itself a security fix?
 
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