My current setup is a 15'' Macbook pro that is plugged into a Thunderbolt display (which has an external keyboard plugged into it - and subsequently, a mouse attached to the keyboard). About 90% of the time, my Macbook is connected to the Thunderbolt, closed, in clamshell mode. However, it gets kind of hot sometimes Even when I'm doing normal things like browsing Safari with 10 or so tabs open. The laptop heats up. Today, when I was browsing Safari, the window froze up! My mouse was moving, but I couldn't click any folders on the desktop, or get my dock to pop up. Then after about 5 minutes, my mouse froze, then I undocked my Macbook from the Thunderbolt display, and just reset the computer by holding the power button. This upsets me because I got the laptop and monitor no more than 2 months ago. And it's already giving me heat issues. Is there anyway people who use their laptops in clamshell mode can better regulate the temperature of their machines? Isn't the vent designed to be able to ventilate even when the notebook is closed?