10.7 Lion makes the fan in my MacBook Pro roar!

i have a 2010 MBA, 2.13ghz Core 2 Duo and this thing does on occasion rev up the fans' most notebly when I encounter flash. I know some folks think they aren't watching flash, but I'll remind you there are a lot of flash ad's still in use on the internet.

So an update...

My fan issues seemed to have gone away on a regular basis. Running flash for longer periods of time still makes it heat up a bit, but overall the other issues seemed to have calmed down. I'm wondering if after you first upgrade to Lion there are a number of background processes like reindexing spotlight that are processor intensive and cause the fan to kick in. Once all those things were updated my fan issues have quieted down quite a bit.

-jamie

SAME ISSUE !!!

After installed Lion, my Macbook pro 17" just gets hot all the time, and I could not take it anymore, so I decided to reinstall and make it runs snow leopard again, and guess what! snow leopard actually makes me happier than Lion that I have bought from App store.

I hope Apple does somthing about it, no hurry. Take your time as long as it's perfect, I can wait. Coz in the mean time, snow leopard is still making me happy.

And please! do not yet launch an iOS5, if it will hurt my iPad2 like Lion did to my MBP 17".

Post Lion - Now if I leave my quadcore macbook pro in sleep overnight the fan randomely spins up and is pretty noisey. UNbelievable! In Sleep! **** thing is NOT supposed to be doing anything during sleep. Uhhh, I think that's what SLEEP is meant for, as in, NO activity!!!

*** Apple?

Same issue here with a MBP 13" SSD 8gigs of RAM... I am thinking of going to the Apple store to see what they can do... Has anyone tried this route?

I just updated my 2.13 MB Air with solid state drive to Lion. It too is now whirring loudly and I have also noticed more heat. Any suggestions?

An update from my previous post. I have also noted that, at times, fans are even spinning when my MBP is on sleep! Also the battery life is now usually less than 2hrs! Definitively not going in the right direction, and overall I am not impressed with Lion.

Same issue just using a MB. My fan will NOT shut off no flash running. CPU actual came down been on Lion for 2 days now. We need a problem solver... My battery life is horrible!!

So I just called AppleCare after I ran into the same problem with my iMac Core i3 after a Lion install and got a simple fix. First I checked and nothing had more than 2% CPU usage (which was Activity Monitor). There were a few at 0.7% and most at 0%. Flash wasn't running and the programs which index Spotlight weren't running and kextcache wasn't either.

What needed to be done was to reset the System Management Controller (SMC). For the iMac he told me all I had to do was simply unplug the power from the back of the iMac for 15-seconds, plug it back in and wait 15-seconds, then turn it on. And the fans were quiet.

I had read this first, so I asked about MacBooks (hoping to help someone here) and he said to turn off the computer, then press shift-control-option and then press the power button and this should reset the SMC. This is for MacBooks without removeable batteries. For removeable batteries, he wasn't sure but thinks it involved just taking the battery out for 15 seconds, replacing it for 15 seconds then waiting, then restarting (but recommended searching for it).

He had also supplied these two articles.

• Resetting your Mac's PRAM and NVRAM
• Intel-based Macs: Resetting the System Management Controller (SMC)

I hope this helps someone. Good luck, my friends.

- Rahul

Resetting the System Management Controller (SMC)

Resetting the SMC on Mac portables with a battery you can remove

Note: Learn about removing the battery on MacBook and MacBook Pro.

1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it's connected.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.
7. Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your ownNote: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).

1. Shut down the computer.
2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.
   Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve

1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.

So... we have to restart our machines everytime the fan starts spinning up? That is a horrible fix, so every time i run a program that takes up resources i have to restart? That is just wrong, this is my first MAC from PC and i am disapointed by this.

I just downloaded aperture on a MBP 13" SSD 8 gigs of ram and that will get the fan roaring like a lion! Sounds like my lappie is about to hover craft it on my table.

Thank you for the post. This immediately fixed the issue! Battery life back to normal on MBP. Fan running as it should. I appreciate your including MB in your call to Apple Care.🙂

-TJ

I followed the steps and initially it resolved the fan running. After a couple of hours it started again. Sometimes it is louder than others. Like others, it is really taking a hit on the battery cycle.

How is this going to be addressed with battery cycle counts? Any other apple resolve?