You need to set Allow Apps Download from to Anywhere.

To play Steam games on your Mac, you have to make certain changes by going to the System Preferences > selecting Security & Privacy > choosing General and allowing your Mac to install, open, and play Steam games. You can even try uninstalling the app and then reinstalling it. If that happens, you can troubleshoot the Steam application by going to the Activity Monitor on your Mac, finding Steam in the list of processes, selecting the app, and clicking Stop. But, if you are ever faced with a situation where Steam not working on Mac, it can be a problem. Thanks to Steam, casual and dedicated gamers on Mac have the opportunity to play myriad games. Ever since its release, its user base has grown to more than 150 million registered accounts.

Steam was launched in 2003 in Windows, and it arrived on Mac in 2010. In terms of gaming content delivery, Steam is one of the biggest success stories of the modern day. While the macOS App Store may disappoint you with its collection of games, you can turn to Steam.

But does that mean Mac users should give up trying to play good games on their system? When it comes to gaming, Windows have always been the first choice of gamers. Apple has struggled with gaming, and even though the company is trying to improve Macs to offer players a seamless gaming experience, it is in its nascent stage.

Free to play steam games for mac