Pygame/Mac setup instructions
If you're running Mac OS X 10.4 on an Intel or PowerPC Mac, here is one method to install pygame that is relatively simple.
Method 1 (MacPython)
Visit the Pythonmac download page and get the latest macpython2.4 package and the precompiled Pygame.
Method 2 (DarwinPorts)
If you don't have the Xcode development tools installed, insert your Mac OS X install CD and install the Xcode tools from there. Alternatively, you can download the 924MB (!) installation directly from Apple.
Install the X11 package from your Mac OS X install CD. I couldn't find a 10.4-compatible version on the web, so you're on your own if you can't find your installation disc.
DarwinPorts is a package management system that makes it easy to install a bunch of open source software. You can download it here. Double-click the installer and follow the instructions on-screen.
Once you have DarwinPorts installed, open a Terminal window. Make sure you have the latest version by running the following command:
sudo port selfupdate
Then, install pygame and its dependencies:
sudo port install py-game