Hallo to all, I have an imac i5 and it is connected with a samsung hd tv via hdmi cable. I want to choose manually from which screen i want to operate. For example, if i want to see a movie on the tv i want to have only the tv screen on and not the imac's display too like it happens now. This is impossible through the system preferences of macosx. If anyone knows a way to do this, like a software for the managment of the displays or the grapfic card please tell me. Thank you a lot all of you.