1
Insert your Mac OS X Install DVD or Installation Disc 1.
2
Restart the computer and hold down the letter "C" as the computer starts up.
3
Continue to hold down the letter "C" until you see a grey screen with an Apple and a small spinning gear.
4
Select your language on the Welcome to the Mac OS X Installer screen and click "Continue".
5
Click "Continue" on the following screen.
6
After reading the Software License Agreement, click "Agree".
7
Select the volume to which you are going to install. "Macintosh HD" is the default name.
8
Click the "Options" button in the bottom corner of the window and select your installation type.
9
Click "OK" and then "Continue". You will be presented with a confirmation window at which point you can click "Install" to proceed.
