I am running El Capitan on the latest Desktop Mac Pro. I am testing Parallels 11 for two weeks in order to ascertain if I can create a virtual Mac running an older system such as Yosemite or Mavericks. I cannot find any information on how to proceed. Lots of information on how to create a Windows machine. Is it possible to create an older version virtual Macintosh in order to use an older printer that will not work with El Capitan. I also have large format printer and I am using ImagePrint 9 which will no longer work on El Capitan. I appreciate any assistance in being able to create a virtual Macintosh operating on an older system so I might utilize my hardware and software that cannot run on El Capitan. Thank you all.