Change the Steam folder to Steam.app, agree to let the OS add the extension, and then double-click on the new app. It'll create a NEW folder called Steam, but leave the Steam.app folder behind. Not all games, even Steam games, put their big files in the Steam folder. There may even be app support items in here from apps you deleted a long time ago. Take a look through this folder. The main steam app is pretty unstable on my 2009 mini, but it's early though, and I'm sure they'll work that out. Portal does take at least 2-3 minutes to load, but I suspect it's running through some kind of crossover-like emulation, and not a full Mac app. It played fine though once on, and it worked with my Kensington mouse.

This is a brief tutorial on the basics of installation and usage of SteamCMD.

1. Create a folder for SteamCMD.

1. Download the SteamCMD (Windows) Update Tool.

1. Extract the contents of the zip to the folder.

1. Create a user for SteamCMD and login.
   Note: For security best practice, do not run SteamCMD a root.

1. Create a directory for SteamCMD.

1. Download the SteamCMD (Linux) Update Tool.

1. Extract the contents to the directory.

1. Open Terminal.app and create a directory for SteamCMD.

1. Download the SteamCMD (OS X) Update Tool.

1. Extract the contents to the directory.

Windows

Browse to the SteamCMD folder and click on steamcmd.exe.

Alternatively Open a Command Prompt to start SteamCMD.

Linux

Steam App Mac Folder Download

Open a terminal and start SteamCMD.

Open Terminal.app and start SteamCMD.

Type help for more information on the available commands.

A full list of commands can also be found here.

To download most game servers, you can log in anonymously.

Some servers require you to login with a Steam Account. To find out if your server requires a login see Dedicated Servers List.

Note: For security reasons, it is recommended that you create a new Steam username just for SteamCMD.

Note: A user can only be logged in once at any time.

Next, enter your password.

Steam App Folder Mac

If Steam Guard is activated on the user account check your e-mail for a Steam Guard access code and enter it. This is required first time only.

You should see a message stating that you have successfully logged in with your account.

1. Start SteamCMD and set your app install directory.

• Windows

• Linux

1. Install the app by using a Steam Application ID or <app_id>. To also validate the app add validate to the command. To participate in HLDS beta testing add -beta beta to the command. To participate in SRCDS beta testing add -beta prerelease to the command.

Example for Counter Strike: Global Offensive

Example for Team Fortress Classic

SteamCMD can be automated to run tasks directly from the command line/terminal. This is very useful for running your own scripts.
Example for Counter Strike: Global Offensive

Windows

Linux

Example for Counter Strike: Condition Zero

Windows

Linux

Example for Killing Floor

Windows

Linux

Steam App Mac Folder Shortcut

For more info about SteamCMD you see the SteamCMD article on the Valve Wiki.