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Installing OS X 10.5 Leopard - Upgrading to OS X 10.5 Leopard

By Tom Nelson, About.com

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Upgrading to OS X 10.5 Leopard - Booting From the Leopard Install DVD

Installing OS X Leopard requires you to boot from the Leopard Install DVD. There are multiple ways to start this boot process, including a method for when you’re unable to access your Mac’s desktop.

Start the Process

  1. Insert the OS X 10.5 Leopard Install DVD into your Mac’s DVD drive.

  2. After a few moments, a Mac OS X Install DVD window will open.

  3. Double-click the ‘Install Mac OS X’ icon in the Mac OS X Install DVD window.

  4. When the Install Mac OS X window opens, click the ‘Restart’ button.

  5. Enter your administrator password, and click the ‘OK’ button.

  6. Your Mac will restart and boot from the installation DVD. Restarting from the DVD can take a little while, so be patient.

Start the Process - Alternative Method

The alternative way to start the install process is to boot directly from the DVD, without first mounting the installation DVD on your desktop. Use this method when you’re having problems and you’re unable to boot to your desktop.

  1. Start your Mac while holding down the option key.

  2. Your Mac will display the Startup Manager, and a list of icons that represent all of the bootable devices available to your Mac.

  3. Insert the Leopard Install DVD into a slot-loading DVD drive, or press the eject key and insert the Leopard Install DVD into a tray-loading drive.

  4. After a few moments, the Install DVD should show as one of the bootable icons. If it doesn’t, click the reload icon (a circular arrow) that’s available on some Mac models, or restart your Mac.

  5. Once the Leopard Install DVD icon displays, click it to restart your Mac and boot from the installation DVD.

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