Parallels, a maker of a multi-operating-system based hypervisor and guest OS management tools, broke the
pattern of Unix-or-Windows based virtual servers by expanding to build one that can run on top of Macintosh hardware and
Virtualization on the Mac. Parallels (like Virtual Iron) doesn’t depend on a specific operating system or
OS-company partner. Its hypervisor and VM management products run on Unix, Windows and, uniquely, on Macintosh hardware. That
allows customers to keep the hardware vendors they already use and build virtual server farms running several operating
systems as the VM host, running Windows, Unix or Mac OS.