How to get game data from Steam

Prerequisites

Some level of experience with macOS Terminal.app;
SteamCMD has been installed;
- HINT: Homebrew provides an easy way to install SteamCMD: brew install steamcmd;
SteamCMD has been initialized. This is done automatically on first launch: run steamcmd in Terminal.app.
- HINT: If you get “Breakpad.framework” can’t be opened because Apple cannot check it for malicious software. error - open System Preferences > Security & Privacy > General and look for message about "Breakpad.framework". You'll need to click the button to allow it to run.
(Obviously) An existing Steam account that has games you're looking to play.

Open Terminal.app and launch SteamCMD by running steamcmd command. You should see the Steam> prompt;
Set install directory by running force_install_dir <directory> on SteamCMD prompt;
- NOTE: We'll assume you're using /Users/<your_macos_username>/Downloads as your install directory. It seems like SteamCMD has issues with ~/ paths, so use absolute path to get files downloaded under your user's home folder.
- HINT: SteamCMD will download files into the folder you've specified, so consider creating a subdirectory specifically for the game you're downloading.
(Unless already done earlier) Login into your Steam account with SteamCMD: run steamcmd in Terminal.app, then login <Steam_Username> in SteamCMD prompt, where <Steam_Username> is your Steam username. Follow the prompts to provide password and second two-factor code.
Set your platform as Windows by running @sSteamCmdForcePlatformType windows command on SteamCMD prompt;
Download game files by running app_update <app_id> validate on SteamCMD prompt. This command will download and validate game files;
- HINT: You can get app_id from Steam game URL: https://store.steampowered.com/app/<app-id>/<game_name>
Congrats! You have got yourself game data for that game, please refer to specific game guide that will detail where to put that data for a certain source port.