This was written by me (because the manual process is sometimes complicated)
As no other modules are being used, you only need the release-osx file
Download it via the release tab.
Change permission by using
chmod +x release-osxRun it via
./release-osxThen, follow the instructions on the terminal.
The program will patch, after you gave it the Half Life 2 path, the game automatically.
You can then play Half Life 2 over steam now on your ARM Mac.
To only build the patch, run
./release-osx --debugYou can find the build at source-engine/hl2
You can use the modules in different projects, like patching different games.