Q: Macbook Pro Retina runs hot while lid is closed and fans working at full speed

I totally agree!

I have seen video of this issue on youtube showing that it was on a table. I'm not sure if it was in a bag previous to the video starting.

I've been following this before I got mine MBPR. Well Since then I've never close the lid and put it in my bag. I always shutdown with reopen and it's madly fast.

Don't give it a chance again do the shutdown instead of sleep till they say something about it.

Good luck

Yep. Just out from the bag and noticed the fans were running (and it was really really hot). For shooting I had to lay it down.

I always thought that when the system was out on the desk, it had enough ventilation, so you couldn't tell that was running. When you put in the backpack, it doesn't have ventilation and thus got warm. I don't have anything to back this up, as it is based on assumption. I do notice that when I put to sleep before closing the lid and packing it, it's always way cooler than when I don't.

IT'S FIXED!!!! THE FIRMWARE UPDATE SAYS IT FIXES A SLEEP/WAKE ISSUE AND ENABLES POWERNAP!!!!

Are you sure?  We need to have a few people on this thread try that for their problem and let us know if it's the answer.

Just updated. Le'ts see...

Sorry to say that is NOT fixed. My MBP Retina has been updated to Mountain Lion and I've updated the firmware as well. Well, today, I closed the lid, without switching it off and put it into his second skin. After few minutes I heard the fan running like ****. I took it out and it was really hot. How is it possible????? It seems like it hates the second skin.

I just experienced the same problem.

Put my MBPr to sleep at about 5:30pm, and just went to go to bed now and could hear the fans going while the MBPr is in my bag. It's 10:30pm and when i opened it up it was at 30% battery left (from 100% when i put it to sleep). It was very hot and could not put it on my lap. hopefully the heat has not damaged anything or harmed the battery.

Opening Activity Monitor kernel_task was running at 580%+ CPU usage.

WiFi is off.

Power Nap while on Battery Power is also off.

I do not have Xcode installed, or any Virtualisation software running.

Looking at the system logs, there is activity between when i put it to sleep at 530pm and when i just opened it now. A lot of Calendar refresh attemps.

How ever looking specificaly at kernel flagged logs, there is errors related to Thunderbolt Ethernet. i use the TB Ethernet adapter while using the laptop today, but disconnected it when i put it to sleep at 530pm..

Because there was 30% battery life when i opened it at 1030pm, that suggests it the fans have only been running full tilt for maybe an hour or so.

Anyway, i hope Apple are looking into this and in the mean time i will shut down my MBPr when transporting it.

EDIT: i'm running 10.8 with all updates applied at time of writing this. MBPr 15" 2.7GHz 16GB/768GB

Awesome details thanks man. It was so helpful.

WiFi was off and there was no Ethernet cable connected. So there was no Internet why Calendar had so many refresh attempts and from where?

Anyway, thank you so much it was perfect.

Coming home from lunch today, I noticed that my Retina MacBook Pro's Apple logo was lit up with the lid closed. The MBP was very hot and the fans were running. It should have been asleep. I always just close the lid to put the computer to sleep.

Opening the lid, the computer was locked up. I couldn't move the cursor and the keys had no effect. I had to restart by holding down the power button.

Another time, a few days ago, the MBP locked up while running Safari. The computer became non responsive and I had to reboot via the power button.

Both times I was running Safari, Mail, and iTunes in separate desktops. My MBP is up to date running Mountain Lion.

Curious.

I FIXED MY ISSUE.  Well, at least it hasn't happened in a few weeks

The most important thing I did was turn off "wake for network access" in system prefs.   That killed a million console messages - more importantly my MBP-Retina actually goes into full hibernation.   Someone mentioned that the automatic date/time sync was always pinging and causing wake ups.

Then I went throug the console and found everything that pinged and determined if it was something I needed.  I've got lots of leftover junk from previous software.  Then I figured out how to delete them all.  I had a license manager from some old software that kept looking for a licese server, MLB.com's ultracast thingy was always on even though I quit using mlb.tv, etc...

There are some articles about Kernal Extensions that also show you everything that's live all-the-time in your system.  Check those out and see if there are things that don't belong.  PROCEED WITH CAUTION.

Im also having sleep trouble with my new Retina MBP 2.6 running Lion, with all updates installed. Sometimes it wont go to sleep, and when it does it wont wake up. It also crashed one time after waking up.

I'm having similar problems.  I close the lid on the computer and assume it goes to sleep.  No external way to tell.  However, I come back an hour later and open the lid and it doesn't start back up.  Turns out that it actually crashed or something because it requires a full power up and upon logging back in all of the apps I had open are all closed and not saved.

Its like I close the lid and the power button gets held down to do a hard reset.

I've turned off the network wake settings so will see if that has any effect.

G