Parallels Desktop 4.0 for Mac became available recently. If you live mostly in one computing environment but need access to life on another operating system, say hello to a product that could well become your new BFF. This latest release marks the fourth generation of Parallels’ hypervisor-based desktop virtualization program. This enables users to run Windows, Linux and other operating systems side-by-side with Mac OS X. Given a choice between Apple’s own Boot Camp dual-boot solution, Parallels Desktop 4.0 is the clear better choice.