About "PC versions" and "Mac versions" of computer software

This will be a bit of a rant. I've noticed several software manufacturers (more often video games) who use the phrases "PC version" and "Mac version" for different versions of their software, to allow people to choose the one that will run on their computer.
While this designation is true for most users of these types of computers, it's actually very misleading and I believe it prevents people from understanding computers better -and also their options. I'm going to explain why, as simply as I can.