Ok, lets say I wanted to use a 2014 laptop running 10.9.5 as the host -- which VM would let me run a 10.12 and a 10.14 guest? Bonus points if it can run a 10.7 (lion) guest. Triple bonus if it can run either a PPC guest, or a 10.6 running rosetta :-) (That's *NOT* a joke, some software never updated.)