They gave some cash money to CodeWeavers, the company that created wine. It's called the Game Porting Toolkit: https://developer.apple.com/games/game-porting-toolkit/
As I understand things, proton allows windows games to just work (pun intended) on Linux. No porting, no rebuild - just download and run.
Who is going to bother doing all the extra work to port their game for Mac?! Time and time again there have been loads of articles on here over the years with developers saying it is simply not worth the hassle to support Linux and Mac.
Personally, I'd wish for more extensive Vulkan support, but I have been informed that this is likely not as easily done considering Apples GPUs with TBDR differ somewhat from the industry standard.
At the end though, if Apple truly wanted, they could simply spent money on studios and incentives ports. None-Mobile-Gaming remains no priority for them, simple as that. I haven't seen any indication that the AVP has changed that in any way and I wouldn't be surprised if they view GoDot not as a game engine, but rather another way to create experiences.
Most studios aren't religious about APIs like FOSS developers, they create API agnostic engines with plugabble backends and move on with what is relevant for their game IP.
It has been like this since the dawn of computer games being fully written in Assembly across 8 bit snowflakes.
So far at least Ubisoft, CAPCOM, Remedy, Kojima Productions and Hello Games.
That should tell us something about the appetite to support visionOS.
There is a relatively easy way for a player to use GPTK to run games from their Steam library on Mac.
Here is how to use Apple's Game Porting Toolkit to install Wine & Steam.
1. Go to https://github.com/installaware/AGPT and download & run the installer
2. Go to https://store.steampowered.com/about/ and download the installer
3. Open a Terminal, run mkdir Games && gameportingtoolkit ~/Games Downloads/SteamSetup.exe
4. Follow the instructions at https://www.applegamingwiki.com/wiki/Game_Porting_Toolkit#Sh...
> We did not work with Apple on this tool
https://www.codeweavers.com/blog/mjohnson/2023/6/6/wine-come...
As far as I can tell, there is no way for a player to use GPT to run games from their Steam library on Mac.