Careful! High Sierra is actually macOS 10.13. By contrast, macOS 13 is Ventura, from 2022. (I personally would accept someone referring to High Sierra as “OS

Careful! High Sierra is actually macOS 10.13. By contrast, macOS 13 is Ventura, from 2022. (I personally would accept someone referring to High Sierra as “OS X” because it’s still version 10 of the Macintosh OS, even if Apple dropped that branding a few years earlier.)