Castaway is designed for desktop or laptop installation in a Microsoft Windows environment. However, it can also be installed in many other environments.
Castaway can run on an Apple Mac, but only if Windows is installed on that Mac.
Windows can be installed on a separate partition on the Mac using the inbuilt Boot Camp product or a third party package like Parallels or VM Ware.
We have many users who have installed Castaway on virtual environments, including Citrix, Terminal Server and Virtual Desktop. As Castaway is licenced per person, it is essential in these cases that the correct number of licences are purchased.