We are using Parallels 10, Mac laptops and Mac Thunderbolt screens. Today, for some reason when we connect to the bigger screen the ability to click the mouse stops (it just makes a sound like a error). When we connect the screen, it comes up saying "Do you want to do a presentation in Parallels" to which we say yes (thinking that will start the mirroring. Parallels works fine when just using the laptop. Sorry if I'm not being clear, limited knowledge about Parallels and need some help!
