I upgraded my Mac to High Sierra and as usual Parallels demands another upgrade of PD in this case to v13. I upgraded it thinking all my existing VMs will continue to work but to my surprise, and w/o any notice from Parallels, nested virtualization support was removed! WTF Parallels, we are paying for an upgrade with LESS features?! I'm not asking for more features but at least keep the existing ones. How am I supposed to run these VMs? This is a total ripoff from a company that doesn't care about users! I'm finally done with this crap. If anybody from Parallels reads this, I'm gonna ask for a refund since this version is crap and can't be used for any serious work.