Once it downloads, it’s a pretty typical Mac app installation process where you just drag the app into the Applications folder and it does whatever magic is needed on first launch: To start, head over to Steam and click on that lovely download link (or just hit the one below): Like an iTunes Store redemption code, however, you can’t really redeem the Steam code without having Steam installed and running on your system, and without you then also signing up for a (free) Steam account. If you’re a computer gamer, it’ll run on your computer, and do a good job. Steam also works with Mac, Windows PC and Linux, so it’s impressively cross-platform. That’s how you can play The Sims 4, for example, as I’ve written about over on my dad blog.
It’s an amazing platform that lets you have all your games, all your saved game data, and all your buddies in one place, even across individual games. If you’re even a casual gamer, you know about Steam.