[frizlab]

OS X does not exist anymore, it’s macOS and has been for a long time now.

[yjftsjthsd-h]

Darwin has gone by lots of names, but that doesn't really change anything.

[wkat4242]

It's called evolution! :)

[Tijdreiziger]

No, Evolution is GNOME’s email client. ;)

[DerekL]

They're two names for the same thing, but yes, people should use the current name.

Also, it was never “OSX”, like the article uses, but so many people call it that.

[graemep]

I disagree. It is unambiguous.

maacOS (in addition to bad capitalisation) could refer to an older and completely different OS.

Meybe not in this context, but it in general clearer is better.