How to Install Mac Leopard OS X on VirtualBox
VirtualBox is a virtual machine software package from Oracle Systems that allows you to install and run multiple operating systems concurrently on the same computer, running in what are known as virtual machines (VM). Once VirtualBox is installed, a copy of each operating system can be installed in such a way that the VirtualBox software can access and run it as a separate instance, completely separated from the underlying original operating system on your computer. VirtualBox supports a number of operating systems, including Mac OS X Leopard (10.5).
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Instructions
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Start VirtualBox by clicking on the "Start" menu, then "Programs," then selecting "VirtualBox" from the programs list.
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Click on the "New" button in the upper-right corner of the main VirtualBox window.
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Type "OS X" into the text field in the "New VM" wizard that pops up, then click "Next."
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Type in the amount of RAM you wish to allocate to your new VM. This number should be half of the amount of physical RAM your computer has, in megabytes (MB), or at least 512 MB. Click "Next."
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Select "Use existing hard disk" in the next window, select the name of the partition you wish to use for your OS X virtual machine from the drop-down list, click "Next," then click "Finish" on the next page. VirtualBox will create your new virtual machine now, and display the main window with your new VM listed on the left-hand side.
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Click on your VM (named "OS X"), then click "Start." A new wizard will pop up, prompting you to insert your OS X Leopard install DVD. Insert the DVD, and the installation process will proceed as it would on a normal Mac OS X installation.
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Tips & Warnings
OS X running under VirtualBox requires its own hard disk partition, and only runs on certain types of hardware. Consult the VirtualBox software support forum run by Oracle to check compatibility.
References
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