I don't think you can for a Mac. I think it's only available for other types of computers. If you do have another type of computer, you have to download Steam and pay for the game.
You can install the Mac version of LimeWire on Mac OS X. (See links below)
Yes you can install Sims 3 on a PC or a Mac.
If you have an Intel based mac install Windows in boot camp and then you can install DBO and play it on your mac
Insert your Mac Osx install Dvd and click install
brew install zookeeper
You download it and press install
Mac OS X install media is a repair disk that allows you to re-install the operating system on your Mac in case of hardware failure or repair. You don't have to have a physical install disc, because OS X is built in your Mac.
The Mac OS X Tiger install DVD is the DVD that allows you to install 10.4 software onto your Mac. 10.4 is Tiger, and so it is called Mac OS X Tiger.
yes
NO
Go To Limewire.com, Download Limewire For Mac OSX and install it like you install any other program.
Yes, you must have a Mac to install Garageband. You could theoretically install a Mac OS on a PC, however the legality of that is highly questionable considering the fact that the colloquialism for such a computer is "Hackentosh".