Nope the game developped by steam there for its like CSS Half Life Left For dead ect it belongs to steam you will have to get it from store or download through steam if not it will be illigal and we cant help you with that here.
Gary's mod is a Steam exclusive
No, it cost $10, but sometimes it becomes $5 around Christmas time.
You don't. Go buy it at steam! It's only 10 USD
Garys Mod was Created By the Valve Game Company, founded By Gabe Newell. Valve is also the creater of the popular first person shooter Team Fortress Two. Valve also created the popular gaming network and store Steam.
You have to complete your pokedex.
It is easier to run minecraft because minecraft does not require much graphics rendering. Garys mod is run using steam and most steam games have heavy graphic needs.
I know for sure that TF2 works for mac, but I'm pretty sure you need steam for Gary's Mod, and steam is only for PC. Although, if you really want it you could install Windows on your mac with "Bootcamp", or download steam with "Cross-Over Games" which are both available for download at the Apple website. Just so you know, you need an Intel based Mac to install "Bootcamp" and "Cross-Over Games"... Hope that helps.
Garrys Mod 10 Is available on Steam, Which can be found at SteamPowered.com You First need to get a Source Game, which can also be found on Steam, that is including Counter Strike: Source. All and all it should cost about 21 US Dollars.
Off of Steam (10$) (http://store.steampowered.com/)
You Haveto Buy It. On Steam Its 6.99
cant the game belongs to steam they made it off Halflife engine so you have to download it through steam or it will be illigal and we cant help you with that.
To download Garry's mod, you first need to download the Steam application, found at http://steampowered.com. You cannot download Garry's mod by itself, you need at least one other Source-Powered game to download along with it. I suggest Portal, its cheaper than other Source Powered games if the main reason you'r downloading it is to play Garry's Mod, and Portal is very entertaining. Garry's mod is about 10 dollars and Portal varys from 15 to 20 dollars. Because they run on Steams Secure Server, trying to get a free copy that runs right is near impossible.