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How Do I Reinstall the Operating System?

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To reinstall Mac OS X (all versions) on your computer, insert your Mac OS X software CD (disk 1) or DVD  into the CD or DVD drive and restart your computer while holding down the [C] key. Once the computer starts up from the CD or DVD, the installation window appears. Click Continue in the first two windows that appear, then read the important information concerning the installation. Click Continue again in the next two windows, then click Agree if you accept the terms of the license.

Select the hard drive and volume you want to install Mac OS X on. When the volume has been selected, click on the Options button that appears on the bottom left-hand side of the installation window. You have the option of archiving or erasing the old operating system.

If you select Archive and Install, you can preserve your files and the users and network settings, as well as place the old operating system into a folder called Previous System, while installing a new copy of Mac OS X. Be sure to check the box labeled Preserve Users and Network Settings if you wish to preserve the files and settings from your previous system software installation.

If you select Erase and Install, all files, personal settings, folders, and software will be deleted when you erase the hard drive. If you choose to erase and reformat the disk at this stage, format it using the Macintosh extended file system.

Continue the installation, which will likely take a while. Insert additional CDs as requested. Once it finishes, you will be prompted to restart your computer. Upon restart, enter all the registration information and follow the prompts. When you are asked to create your account, enter a User Name and Password. Don't forget this password; you will need it if you ever want to perform additional installations and system updates. You may find it advantageous to include a hint should you forget the password.

Select the appropriate time zone, date, and time. The installation of the system software is now complete. When the computer starts up to the new operating system, you may be prompted to install software updates.  Run software update, then restart your computer.  Any application software can now be installed.

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08/13/08

Last Updated: 8/18/08