Yeah, because nobody ever writes 'on Windows' or 'on Linux'. It's really only Mac users who every specify which platform they're recommending something about.
Normally, people assume you use Windows, so it makes sense to mention you're on Mac. I see Linux people doing the same all the time.
What do you mean? They are just saying that their experience is with mac, so they recommend the mac version? If anything the incredible thing is that such a normal statement can actually be perceived as something else as soon as Apple is mentioned.
Couldn't possibly be that they also make good stuff. Crazy talk!