Virtual
desktop software, such as Parallels or VMware Fusion, makes it
incredibly easy to run Windows applications on a Mac. But what if you
wanted to run another version of OS X? In this screencast, I show you
how to install both OS X Lion and Mountain Lion using Parallels,
allowing you to have multiple versions on the same Mac at the same time
with no dual booting!
Screencast
Install Two Versions of OS X on One Mac Using Parallels
Unknown
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