- The hardware version of the vm, whatever is the latest that Fusion v12 offers versus the latest that v13 offers (Fusion prompts to upgrade the vm to the latest hardware version, and I always do it; I don't time to try downgrading the hardware version of the vm in Fusion 13, as that'd require upgrading to v13 again, possibly messing up the 12-created vm for testing, then, if it doesn't, work revert to Fusion v12 and create a new vm; I already ate enough unbillable hours on this doing QA testing that VMWare should do, not me)
I NEVER do this with ANY of my VMs... of course, I'm a Process Control Engineer whose head it has been drilled into - if it ain't broke, don't fix it! Unless I have a good reason to use newer features that a newer virtual hardware supports, then I leave my virtual hardware alone. Many of my VMs are running at either Workstation 5.x compatibility or Workstation 10.x compatibility.
