I was shooting from the hip and not documenting it, but i’ll try to recount my steps
- open dom0 terminal run
qvm-template-gui(this should launch the template gui) - in the gui scroll down until you find the Whonix 16 templates (2 of them)
- click on the template(s) you want where it says “available”, a drop down will appear and select “install”
- hit “Apply” (top of gui) the gui will download and install templates
- after it finished I closed all Qubes and rebooted (my choice)
- open the dom0 terminal and enter ‘sudo qubesctl state.sls qvm.anon-whonix’
- the rest is automatic except for changing all references to whonix 15 to whonix 16 from the Qubes Manager (this was a little hit and miss but I got it done by looking in settings of each Qube)
- one twist for me was that the whonix-ws-16-dvm was in the Qube Manager but it did not show up in appmenu. I finally fixed this by opening settings on whonix-ws-16-dvm from Qube Manager application tab and selected a few applications and presto… it showed up in the appmenu.
- one more thing you can do to check that its 16 running is open a terminal from newly created whonix 16 qubes and run " cat /etc/os-release. I just looked for debian 11 since my whonix 15 qubes were debian 10
good luck