Hi I've had the retina iMac now for a couple of weeks now and have a question re the sleep mode. I see that apple have removed the separate sliders for display and computer sleep so the only way to keep the mac awake longer than the screen wake time is to check the prevent computer from sleeping automatically when the display is off option in energy saver. Is there any way to tell the difference between computer sleep and display sleep on an iMac? I've seen a few methods mentioned but none seem to work. Caps lock doesn't work as the keyboard turns the caps lock light off before it sleeps. I've also seen mentioned that the trackpad can indicate if the computer is sleeping or just the display. It reckoned if you move your finger on the trackpad and the display comes on then it was only the display sleeping but if you have to click then the computer was sleeping. On my iMac i have to click the trackpad to get the display back on but i still think it was just the display sleeping. So, Does anyone know a definitive way to prove if the display is sleeping or if the computer is sleeping?