Computer users wanting to run Vista on Mac OS or Linux will have to buy an expensive version of Vista if they want to legally install it on their systems using virtualization technology.*The end-user license agreement for the cheaper versions of Vista (Home Basic and Home Premium) explicitly forbids the use of those versions  on virtual machines (eg

“You may not use the software installed on the licensed device within a virtual (or otherwise emulated) hardware system,” the end user license agreement states.

However, the more expensive Vista Enterprise and Ultimate Editions, can be installed on a virtual machine. From the end user license agreement: >>>>>