Usage There is no GUI, these are all command line programs and files. You will need at least basic familiarity with Terminal to use these files. The basic usage instructions from the official release also apply to this version. For most games and single player functionality only, the following should be sufficient: Place a file called steam_appid.txt in the game's directory that contains its libsteam_api.dylib (probably somewhere in its app bundle). This file has to contain the game's Steam App ID (just the number). Rename the libsteam_api.dylib of the game to libsteam_api-org.dylib (or similar), and then copy the libsteam_api.dylib of the Goldberg Steam Emulator in the same directory. (Optional, only possibly necessary if the game doesn't run after the previous steps) tools/generate_interfaces/find_interfaces.sh on the original libsteam_api.dylib of the game. Place the output of that script in a file called steam_interfaces.txt in the same directory as libsteam_api.dylib