Hello Stuart,
That is correct. 2020 Design can only run on a Windows . In order to run it on a Mac computer, you will need a virtual layer like “Boot Camp” to simulate a Windows Environment.
Also, you should know that V9 is a very old version (rolled out in 2011) and is no longer supported.
V12 has been rolled out October of last year.
Thank you,
Santiago
Product Manager of 2020 Design