Just the other day I wanted to compile some application from source on my Mac OS X 10.6. Unfortunately, there was no ‘make’ or ‘gcc’ found on my machine.
Searching the net, I found that I had to install xCode, which contains all the developer tools one need to start developing on your mac. To get this package, I had to register at http://developer.apple.com/xcode/. So I did and I got access to the xCode package.
When I tried to install it, I got the message that only Mac OS X 10.7 (Lion) is supported. Bummer!
Gladly, I found that xCode is on the OS X install dvd as well
So I hope you first read this post instead of immediately registering on developer.apple.com
