Asking users to configure non trivial components of the OS in a specific way that affects all running software just to run Dolphin is a terrible idea. The process you do in Virtualbox on windows to install any operating system is the same installing OS on Virtualbox using a Mac computer. Terminal can be used to get a local terminal window and also supports SSH connections to remote servers. It runs on PowerPC Mac OS X as well as Intel Mac OS X. If you want to play Halo don 39 t upgrade to Catalina. Mac os catalina emulator online Chances are most of your games are Steam.