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Mac game developers need to enable this in Steam to avoid a 32-bit problem

AppleInsider • Fri, 19 Jun 2026

Mac game developers need to enable this in Steam to avoid a 32-bit problem

If Mac game developers miss these settings, their brand new game for Apple Silicon will be listed as unplayable on anything after macOS 10.15 Catalina. Here's how to tell Steam that your game is compatible, and where the flags are. Steam's macOS Catalina warning Valve Software's gaming storefront, Steam, is the biggest of its kind when it comes to PC and Mac gaming. It is essential for any game developer targeting those platforms to put a build on Steam, due to the sheer size of its audience. However, while Steam is relatively simple for gamers to use, the back-end is considerably more complex. For a developer starting out , there are many things that can be missed when putting their game onto Steam for the first time. Continue Reading on AppleInsider | Discuss on our Forums

What happened?

If Mac game developers miss these settings, their brand new game for Apple Silicon will be listed as unplayable on anything after macOS 10.15 Catalina. Here's how to tell Steam that your game is compatible, and where the flags are. Steam's macOS Catalina warning Valve Software's gaming storefront, Steam, is the biggest of its kind when it comes to PC and Mac gaming. It is essential for any game developer targeting those platforms to put a build on Steam, due to the sheer size of its audience. However, while Steam is relatively simple for gamers to use, the back-end is considerably more complex. For a developer starting out , there are many things that can be missed when putting their game onto Steam for the first time. Continue Reading on AppleInsider | Discuss on our Forums

Story details

If Mac game developers miss these settings, their brand new game for Apple Silicon will be listed as unplayable on anything after macOS 10.15 Catalina.

Here's how to tell Steam that your game is compatible, and where the flags are.

Steam's macOS Catalina warning Valve Software's gaming storefront, Steam, is the biggest of its kind when it comes to PC and Mac gaming.

Why it matters

This page keeps Apple rumors separate from official updates, so readers can follow early reports without confusing them with confirmed announcements.

Original source

https://appleinsider.com/inside/macos/tips/mac-game-developers-need-to-enable-this-in-steam-to-avoid-a-32-bit-problem?utm_source=rss