Are there any other architecture changes that are preventing 32 bits binaries from running? Does that also mean that old software no longer runs unless there is a 64 bit version?
In windows you can run x32 and x64 executables in a 64 bits machine
On Windows, this was is implemented as SysWOW64. WOW64 means Windows on Windows 64. It makes the userland emulation and pretends towards the process that everything around him (incl. drivers) are the 32-bit ones.
Source: Microsoft.
https://devblogs.microsoft.com/oldnewthing/20081222-00/?p=19...
It's literally a 2004 game! That's ridiculous. A handful of opterons existed in the market, but Intel wouldn't get there for years still and it was well over a decade until x86_64 crossed 50% market share in consumer stuff.
Good grief, as it were.
Needless to say, annoying a bunch of HN nerds a quarter century in the future wasn't on Valve's radar. They just wanted some Mac revenue and picked the low hanging fruit.
What? First, those chips were plenty powerful to run HL2 (the game predates them). And second, all x86_64 chips can run older x86 32-bit code unmodified.
The reason macOS stopped supporting 32-bit code has nothing to do with the processors but more about them wanting to remove support for 32-bit binaries from the kernel and from all user-space libraries. To run a 32-bit binary, you need itself and all libraries it depends on to be 32-bit too, including the syscall boundary, which is "fine" (both Windows and Linux do this just fine, so it's really on Apple to have removed this). And I suppose Apple removed those because it was building towards a 64-bit-only world to simplify the Apple Silicon transition.
Valve wanted steam to co-exist on the mac in the early days and John Sculley of Apple didn't want Apple to be seen as a gaming device or a "personal home computer". So they ceased contact with Valve and the rest is history. https://www.youtube.com/watch?v=lPTLPXNtb2I
Apple refused to license joysticks so they could prevent customers from considering early mac's as game machines and deliberately refused to support games on the machine. Myst was only few that were exclusive to the Mac; that they then ported to PC.
If you watch the YT video they go in to depth that they attempted to port the game and was axed by apple.
The main issue IMO is the Apple hardware itself isn't focused on raw performance, it's on energy efficiency and mobility. You'd need a MacBook Pro or Mac Studio at least to have the GPU cores & RAM to play the most recent PC games. And so they just tend to lead with casual games, live service games, and second run AAA games. Technically Apple maintains the world's largest gaming platform (by users & revenue) in iOS.
And plenty of AAA games have been ported to macOS like Cyberpunk 2077, the last few Assassin Creeds (Shadows, Mirage), or even iOS/iPadOS/visionOS like Control & Death Stranding, the recent Assassin's Creeds, Resident Evil 2 & 4 Remakes, RE 7 & 8, Civ 6 & Civ 7, etc.
Is it, though?
How Hard Can It Possibly Be to just do a software GL renderer that emulates a mid-2000s Radeon, these days?