Installing Git

On Windows

1. Install msysGit

A nice graphical option on Windows is TortoiseGit, though you need command line Git if you are using IntelliJ IDEA.

On Mac OS X

1. Install Xcode from the Mac OS X CD
2. Install MacPorts
3. From the command line: sudo port install git-core

A nice graphical option on Mac OS X is GitX, though you need command line Git if you are using IntelliJ IDEA.

On Ubuntu Linux

1. From the command line: sudo aptitude install git-core

Other flavors of Linux likely have a similar package available.

More information

See this guide for more details for all three OSes.