Cannot finish install of Solaris 11.4 on _x86 VM

I am trying to run Solaris 11.4 on MX Linux Oracle VB. The installation successfully completes, then I am asked to reboot in order to start the OS. There's nothing in the VB menus to reboot. I typed reboot at the prompt but it then asked me for VBox console login?
I can't find the system/volatile/install_log directory or log file it suggests and I get stuck in a loop of trying usernames and passwords.
I didn't create any user names or passwords when I was setting up this unattended install so I don't know what to do. Since the

/var/log/install/install_log

hasn't been created, that's no help.
If I can give more info I will try but I will need to be questioned.

I would have expected the option to specify an initial user/password during the installation routine. However, if you didn't see that then it is almost certain that you will not be able to login as 'root' because on Solaris 11 root is a role and not a user account. Once you can login to a user account and 'su' to root you can elect to convert root from a role into a legacy user account that can be used to login to the system.

If you have not specified an initial user account to use during the installation routine then I would try userid 'jack' and password 'jack' (Without the quotes of course!) which is documented as the default account credentials.

Welcome to the forums. Please post back your progress.

So I tried jack and jack with no change. Should I try using qemu for this?

That's asking you to login to Virtualbox NOT Solaris.

The default credentials for that are:
Userid - vboxuser
Password: - changeme

Try that

Yes, I did try that, my first try above. I was excited until it failed. What I'm trying to ascertain is how to reboot in the VM. However, vboxuser, changeme doesn't work.

Reboot first.
A GUI installer screen should offer a system reboot. Or use the VM controls to do a soft reboot.

I don't see a GUI screen. All I see is the "Reboot to start the installed system".
How do I do a soft reboot?
I have feeling this might work if I was installing on bare metal.

In Oracle VirtualBox Manager, right-click on the VM, a local menu pops up which offers a soft shutdown via ACPI.
The VM Window closes.
Then start the VM again.

Progress! OK this I did, choosing a user name and password then I got stuck here:


The good news I'm inside Solaris. Now I need to figure how to get from this to a Desktop.

Ok.
The desktop should have been started automatically... and even the Solaris installer should have prefered the GUI mode.
Now you are on a text console, and even the sendmail serviced writes a problem to it (instead to a log file).
List the failed services:

svcs -xv

Temporarily turn off the sendmail service. Run svcadm as root.
Try with sudo

sudo svcadm stop sendmail

Or start a root shell. If you know the root password then run

su -

The root shell has a # prompt. There you can run svcadm commands. With command

exit

you terminate a shell.