2011 MBP with Parallels Desktop 11

[24c]

Harry,

Posts got crossed as I was typing up the update.

Important things to remember, you have to be in full screen mode for the MacBook to go into Presentation mode in Parallels, and I think the best way to force this is unplug the Mini Display connector, and plug it in again. The second monitor will default to 1024x768, and you'll have to reset it again via List all modes to 800x600. you won't really notice the projected image from the scanner shifting down a notch, but when you open Einscan it'll be a white screen, and you'll be able to control the scanner again.

I'll have another play later, but this might give you some hope.

Enjoy
Mike