Half-Life is back and better than ever. Alongside interviews with the original developers, the game is now available with the Uplink mini-campaign, Steam Deck support, updated graphics settings, new multiplayer maps, and bonus restored goodies.
Last I checked no, the game engine was 32 bit but the Mac won't run 32 bit apps anymore. Or something like that. My hope with this refresh was 64 bit support.
Have you actually installed and run it? I know there were quite a few games that steam claimed couldn’t be run because of that and still did. I don’t remember if portal is one of them though.
Battleblock theater for instance says it can’t but still does.