

In general no, at least according to https://en.wikipedia.org/wiki/MacOS#macOS the name change happened several years before the architecture change. But I don’t know what the distinction is on that graph; it’s possible it just depends on how the OS is called in the user agent string?















Yes, this is true (although the name change happened years before the major version was no longer 10) and doesn’t contradict anything I wrote. But the first version of Mac OS X was an entirely new OS technologically unrelated to Mac OS 9; not the case for later version jumps.