A second install worked and I was able to open a VM with the Tech Preview.
However, not my old version of VMWare is demanding a license number, and won't accept the codes it was originally licensed under. I have reported this separately.
FWIW, here's the console output you requested:
Last login: Mon Jun 3 19:07:56 on console
Walters-MacBook-Pro:~ walts$ sudo nvram boot-args
Password:
nvram: Error getting variable - 'boot-args': (iokit/common) data was not found
Walters-MacBook-Pro:~ walts$
Walt