As if war, famine and inequality weren't enough to bring us down, Mac users also have to live with the knowledge that some poor souls have no choice but to crazy up their hard drives with secondary operating systems. Where Windows is concerned, many Mac users opt to use OS X's free Boot Camp partitioning software to make their Mac a lean, mean dual-booting machine. Unfortunately, doing so means you'll be losing a significant amount of the hard drive space that was once available to your Mac. A less hard disk-hungry method for getting a secondary OS on to your Mac is to install it into a virtual machine, commonly known as a VM. By using a virtual machine application such as Parallels or VMware Fusion, Mac users can run set up as many VMs running any number of different operating systems on their computer as they want, and all from the comfort of OS X.
