Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

My MacBook Pro gets stupidly hot when I'm working on it normally (not clamshell). I am worried that the heat could damage the screen if I use it in clamshell mode.

I thought that I could place it upside down (in the sense that the Apple logo and LCD panel lie flat on the table) on a non-slip surface so that the heat would vent right out of the (now) top and away. Could I knacker the fans by running them upside down?

The laptop is a 15" MacBook Pro with retina display.

share|improve this question
    
Why use it in closed-clamshell mode rather than using an extended display mode? –  XAleXOwnZX May 2 '13 at 23:21

6 Answers 6

up vote 7 down vote accepted

You can place the Mac in whatever orientation you like during clamshell mode as long as it's supported and protected from falls.

I really like the Book Arc stand so that the trackpad area is by the table and all the warmer section near the hinge is up and exposed on all sides to airflow.

Your proposed mechanism should be measurably cooler when you have the CPU generating maximum heat and for some reason the airflow / ambient temperature wasn't cooling things as much as you had hoped. The air trapped in the LCD panel can have a fairly good insulation value and if the surface is soft, airflow under the feet is diminished.

The Apple fans are high quality and likely magnetically suspended or have so little play it's not a concern unless you have shocks or other accelerations.

share|improve this answer

One reason I can think of is that while the bottom is protected by rubber feet, the top is exposed. While you may think the surface you're placing your Mac on may look clean, it's possible that there's some grit that will scratch your Mac when it moves. A non-slip surface might mitigate this somewhat, but you may also want to invest in a skin to protect your computer.

share|improve this answer

The heat is unlikely to damage the screen (I've run mine in clamshell mode for a long time) and I'd be concerned about damaging the finish.

An alternate solution: If you have the room, open the laptop and place a magnet on top of the case near the batter meter or auto port area (I don't know exactly where the sensor is on the retina but that's where it is on my MacBookPro8,2). It will think the lid is closed while still allowing for vertical convective and radiant cooling.

share|improve this answer
    
Thanks for the tip. I'm thinking of getting one of the cooler master L stands so that I can stand vertically it with the hinge towards the ceiling. –  Andrew May 2 '13 at 23:21

If heat is your concern, I recommend the Griffin Elevator Stand. I use it personally and prefer it over my previous laptop stands because of how exposed the underside of the laptop it is. 2 (rubber padded) metal brackets are all the block the bottom of the laptop, allowing for great air circulation.

share|improve this answer

I have read about MacBook Air's that clock down the CPU slightly when in clamshell mode. I haven't performed any testing on this, but it is possible that retina macbook does the same thing.

share|improve this answer

The CPU clocks it's self down dynamically depending on temperature, number of cores active and power see turbo boost http://en.wikipedia.org/wiki/Intel_Turbo_Boost

share|improve this answer
    
Your statement is true, but how does it relate to the question about gravity and running a Mac in clamshell mode? Should this be a comment on another answer? –  bmike Jun 27 '13 at 18:40

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.