not sure if this is what you mean; but you can make a backup file (ova) of your VM and it'll run on any platform that Virtualbox supports. As far as I know, qem

not sure if this is what you mean; but you can make a backup file (ova) of your VM and it'll run on any platform that Virtualbox supports. As far as I know, qemu doesn't have an option like that, nor does VMWare Player. I don't know what Workstation does or doesn't have in that regard.