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


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Upgrading to OS X 10.5 Leopard - What You Need
Customers line up to purchase the Apple operating system Leopard at an Apple store October 26, 2007
Win McNamee/Getty Images News/Getty Images

When you’re ready to upgrade to Leopard (OS X 10.5), you will need to decide what type of installation to perform. OS X 10.5 offers three types of installation: Upgrade, Archive and Install, and Erase and Install.

The Upgrade option is the most common method of installing OS X 10.5 Leopard. It effectively preserves all of your user data, network settings, and account information, while it installs OS X 10.5 Leopard over your existing operating system.

Upgrading is a great choice for most users, as long as their current version of OS X is performing without any major issues. Specifically, if you’re experiencing unusual application crashes, freezes, or even your Mac shutting down unexpectedly, it’s a good idea to try to correct these problems before performing an upgrade.

If you’re unable to correct the problems you’re experiencing, then you may wish to consider one of the other installation types (Archive and Install or Erase and Install), in order to end up with a correctly functioning installation of OS X 10.5 Leopard.

If you’re ready to perform an upgrade installation of OS X 10.5 Leopard, then gather up the necessary items and we’ll get started.

What You Need

  • A Mac with a G4, G5, or Intel processor, 512 MB of RAM, a DVD drive, and at least 9 GB of free space.
  • A Mac OS X 10.5 Leopard Install DVD.
  • A half hour to one hour of time. The amount of time the installation will take depends on the type of Mac you’re installing OS X 10.5 on.
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