[blep_]

... Steam isn't the thing that doesn't support MacOS. I don't know why you're mentioning Steam.

But yes, console and OS exclusives are a plague and people should stop making them.

[hifreq]

I am mentioning Steam as an example of an ecosystem that offers exclusive apps on different devices. The fact that I can install Steam on a Mac is sort of irrelevant considering that I can't play the games that are offered through Steam on my Mac. Many indie games are offered only on Steam, so it's a monopoly in this sense.