Currently my Mac is running Mojave and I have a Windows 8 Guest OS. I have a Windows app that is a 32-bit one and I've confirmed that the Windows Guest OS will still be able to run that app if I upgrade to Catalina. However I have a Mac app that is a 32-bit one so it won't run if I upgrade my Mac to Catalina. I've checked and this app is not going to be upgraded to 64-bit. I've not found a comparable 64-bit app so I'd like to be able to run this app after I upgrade. I was thinking that the solution might be to have a Guest OS running Mojave after I upgrade to Catalina and just have this Mojave OS running the 32-bit app. Would this be feasible and how would I go about making this change?