inflation/goldberg_emulator ? reverse-engineered prompt

Build me a clean, working version of this Steam emulator project that I can compile and run on macOS, while keeping it working on Linux and Windows too.

I want the core pieces to build properly, the Steam API replacement library, the steamclient and networking parts, plus the helper tools and example files that the repo already mentions. Please make the build process simple and make sure the README or release instructions clearly explain how to compile it, install the needed dependencies, and swap it into a game folder.

If anything in the current code only works on Windows, please adjust it so the macOS build is as complete as possible without breaking the existing behavior. If you need to check current docs or platform build details online, go ahead. I care more about it being reliable and easy to build than adding new features.