https://arstechnica.com/apple/2023/06/apple-has-a-proton-like-game-porting-toolkit-for-getting-windows-games-on-mac/

There was so much packed into Apple's WWDC presentation Monday that it's hard to believe there are still major pieces of it left to uncover. And yet, as part of a developer presentation, Apple has quietly announced what could be major news for PC games on Mac hardware—its own SteamOS-like Windows compatibility initiative, but for millions of Apple Silicon Macs instead of Steam Decks.

"Bring your game to Mac" is laid out over three videos covering a game controller guide, a Game Porting Toolkit (Apple developers only), and a converter for making games' shaders work with Apple's Metal hardware acceleration API. Apple claims you "have everything you need to deliver an amazing gaming experience" with Apple-Silicon-based Macs and that its toolkit provides "an emulation environment to run your existing, unmodified Windows game."