[How To] Install Mac OS X Lion 10.7 In A Virtual Machine On Top Of Mac OS 10.6 Snow Leopard

If you want both the versions of Mac OS (Lion as well as Snow Leopard) and don’t want to deal with dual booting, another option is to run Mac OS X Lion in a virtual machine atop an older 10.6 Snow Leopard installation. You will require VMWare and a Mac OS X installer app.

Installing OS X Lion in a Virtual Machine Over Snow Leopard

Proceed to install VMWare as usual, and make sure you have the OS X Lion installer .app somewhere that’s easy to access. Everything else is just as straight forward:

    • Launch VMWare and use the Virtual Machine assistant to create a new VM, configure it how you want
    • At the “Installation Media” section, drag and drop the OS X Lion Install.app into the window, so that “Use operating system disc or image” is checked and the ‘Install Mac OS X Lion.app’ is the media

  • Click on “Continue” and configure the VM, then boot it so the OS X Lion installer is loaded. When Mac OS X Utilities is loaded, select “Reinstall Mac OS X” and click “Continue”, clicking through the familiar Lion installer.

However, if  you want performance out of your Mac then you would be better off with a native installation rather than such such parallel installation.Although such sort of installation is ideal for work related to testing. If you have a real need to run both Mac OS X 10.6 and 10.7 for app compatibility, you’d be best served using the dual boot method we mentioned before for performance reasons.

Source: OSXDaily