I have been using a mac mini (quad core i7, 8gb RAM) successfully for 6 months now with CS5.5 Premier, After Effects etc. I would now like to use dual screen editing and and be able to preview the output from the timeline from the HDMI port as well as the preview being visible on the main monitor. I have found a reference window, but this only shows the still image when stopped. I got very used to this feature on FCP but Premiere CS5.5 doesn't seem to be able to do this. Any advice on how this might be possible would be gratefully received.
Just figured it out for anyone who is interested. In sequence settings you need to click on Playback settings, then you can select you HDMI monitor from the external device pull down menu.