Thanks, Arun.
I tried what you suggested, to no avail, sadly.
However, while I was poking about the menus, I selected Devices>External DEvices>Apple internal keybaord...
That gave me keyboard input once again, for which I'm thankful, but it seems to come with some side-effects - I can't "unlock" my cursor from the virtual machine window / can't switch OS X virtual desktops (even using ctrl-arrow) / trackpad behaviour changes - cursor speed slows way down (i.e. cursor distance on screen per inch fingertip moved across the trackpad is severely reduced) / in full-screen, cannot access the menu by running cursor up to the top / Can't switch to OS X. the only way to recover is to shut down the VM which returns control to OS X.
So I am partway there but why, oh, why can I only get a response to the kybd using this method? I've never had to do that before. The kybd/trackpacd has always just worked.
Last edited: Dec 17, 2017