I'm only referring to the VirtualBox experience asked about by qwerty456127. Running e.g. Debian with Gnome under MacOS became extremely sluggish for me. The sc

I'm only referring to the VirtualBox experience asked about by qwerty456127. Running e.g. Debian with Gnome under MacOS became extremely sluggish for me. The screen re-renders slowly, like running a remote desktop over a slow network link. I did a lot of searching and setting-tweaking when I encountered the problem earlier this year. I never found a satisfactory resolution. I tried this fix: https://mkyong.com/mac/virtualbox-running-slow-and-lag-on-macos-macbook-pro/ https://mkyong.com/mac/virtualbox-running-slow-and-lag-on-ma... as well as others suggested on the VirtualBox forums, but couldn't get it running smoothly. I didn't have any trouble with a similar setup several years ago.