I tried booting 18.1.0-rc10 Xfce ISO as guest on Vmware Fusion Pro 10.1.6 (macOS host). It gets to the GUI but then it just freezes, the mouse pointer is still there and it moves around but can't click on anything. The host CPU is at 100% and the fans come on.
FWIW, 18.0.4 ISO works with the same setup.
Any boot options that I can try that might help or any Fusion settings I may need to tweak? I tried both free and non-free drivers, same behavior, not even sure this would make a difference when running as guest anyway.