Cubase VST 5.1 to newer on Apple?

I have Cubase VST 5.1 on an old PC. i intend to get a new computer (likely Apple) and would like to install the latest/best version of Cubase. i’d appreciate any reaction/counsel/advice from folks on the following questions:

  • can i save songs on the old 5.1 and load them onto the new, Apple-based system?
  • any considerations on moving to Apple from Windows as an OS?
    thanks for any input