Macbook fan running at high rpm when doing nothing

My macbook a1181's fan is always running at a high rpm and a can't figure out why. I already checked the activity monitor, made sure there was no documents waiting to be printed (i have had this problem in the past), and I removed and cleaned the fan and vents. Could os x 10.7.5 be part of the problem? I had absoutly no issues with 10.6.8.

Check your activity monitor. Sounds like you have a program running in the back ground your not aware of.
You might also try to reset the SMC and/or PRAM.

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IMac fan runs a High RPM and screen goes black after 10-15 min

20" iMac 2.66 purchased April 2008.
I know this has asked elsewhere most likely but I thought I would start fresh.
A few weeks ago my cooling fan started running at high RPM, with really no reason (sitting idle with no applications running). Less than a week later my screen would go black about 10-15 minutes after startup (computer stays on and fan still running). If I re-boot the black screen just appears more frequently (maybe two minutes sooner each time)
Of course I am just outside of my Applecare coverage window!
Also, I have a MBP and would like to access my iMac hard drive. I can't remember what commands to push to access another Macs hard drive.
Thanks for your thoughts and help!
Mike

"I have a MBP and would like to access my iMac hard drive. I can't remember what commands to push to access another Macs hard drive."
I think you are referring to Target Disk Mode.
http://support.apple.com/kb/HT1661

IMAC G5 fans running at high RPM

Hello,
I have a 20" G5 iMac and just had the motherboard replaced under warranty. Since the replacement my fans will start to run at very high rpm's fr no reason. It will happen even when the computer is not being used and no applications are running. It is currently at:
CPU 122 degrees
CPU fan 2996 rpm
HD 124 degrees
HD fan 4178 rpm
System fan 3098 rpm
I have called applecare and they had me do several resets which seemed to help for about 1 hour and then the fans have ramped up and not gone down in the past hour. This last time I was watching TV and heard a noise from the computer and low and behold it was the fans. Nobody was working on the computer and all apps were closed. I bought this computer in September 2005 and have had 2 lcd's replaced and a logic board replaced. I am getting frustrated with this, my first, Apple computer. Does anyone have an idea of why the fans are running so high? I never had a problem like this with my old logic board.

Have you looked in Activity Monitor to see if any applications are causing the fans to run? Applications/Utilities/Activity Monitor.

Temp and Fans running at high rpm

My CPU A is running at 93˚F and both fans are running over 6000 rpm. I've checked permissions and verified, did a system shut down, removed battery, disconnected power and help power button for 5 secs for restart and still fans noise is extremely loud. I've checked activity monitor and everything seems fine. Anyone have any other ideas to make this machine run cooler and with less noise? I recently added Adobe software updates.

Some versions of iStat Pro were implicated in "wake from sleep" issues especially when "Network" was turned "On" in the settings, PB1701.
It is generally a reliable piece of software though. Personally I prefer Marcel Bresink's "Hardware Monitor" - http://www.bresink.com/osx/HardwareMonitor.html , which provides additional information and runs as an app, rather than a widget. It also allows you to generate ongoing "history" graphs, which can be useful in tracking down "high stress" activities and the like. (A Hardware Monitor "widget" is also available for those who like such things)
Cheers
Rod

Imac fan running at high RPMs

My IMAC fan was running just fine then yesterday the fan started running continuously at high RPMs. Computer otherwise runs fine. what can i do?:

Welcome to Apple Discussions!
Ignore it, unless you see 4 language screens saying you must restart, or the machine shut down on its own.
P.S. Odd you posted this to a forum that has nothing to do with your iMac or operating system. Was that glitch with the forums, or your mistaken navigation, or is your system the issue is happening on not the one shown with that operating system?

Just replaced battery on MBP, and seems that fans run at higher rpm/louder

Hello all;
Tell me that I'm crazy, but I just replaced my MBP battery with a brand new OEM MBP battery and it seems that the fans are running at 4K rpm constantly now. With my just replace old battery, the fans would stay around 2K rpm.
Is this normal? Seems quite annoying. The older battery is ~1 yr old, and had very poor statistics on life and cycles. I accept the fact that I had to replace, but this fan noise is driving me CRAZY!!!

Hi TooManyApples: It may be an activity using too much of the CPU. Check by going to Applications > Utilities > Activity Monitor. Select CPU at the bottom of the page, sort by CPU column, and be sure to select "All Processes" from the drop down list at the top of the page.
Hope this helps
Stedman

ODD and CPU fans running at high RPMs

Hello!
My iMac's ODD and CPU fans are running at unusual high speeds. If I turn the computer off and on they usually run at a normal rate but start rotating at around 3700 RPM very quickly (about 1-2 minutes after the OS X has started). The CPU load is not unusually high. The HDD fan is not affected.
I have tried SMC and PRAM resets multiple times.
27'' iMac - Mid 2010 (iMac11,3)
Intel Core i7 2,93 GHz
Boot-ROM-Version IM112.0057.B01
SMC-Version 1.59f2
Thanks!

For some reason the high fan RPMs had to do with having two desktops under mission control.

MacBook fan running high most of the time after HDD/Hard-drive Upgrade

Hi guys,
I've just recently upgraded my MacBook white's (MacBook5,2, 2GHZ duo core, 4GB ram) stock harddrive to a WD 2.5" black 750GB. After which, I noticed my macbook fan running at high speeds majority of the time... Even when just doing light weight stuff on it, such as surfing the net using Safari or even just leaving my computer idle after startup.
I did a clean install twice, the second was too see if it was really just a badly installed OS, but the problem still persisted, well at least till I decided to come here to type the post =P (maybe my macbook's scared about being talked about). Do note, that I did a pc migration each time.
After the upgrade, My fan usually runs at about 5000-6200 rpm, but right now as I'm typing this post, its surprisingly alot lower then what I've been experiencing. About 3000rpm-4000rpm.
As for the harddrive temperature, I noticed it runs between the 37 degree to 40 degree celsius range, so I'm guessing the hard-drive temperature sensor isn't busted, which was the problem for others from what I've read from other discussions here.
Also, when I boot my windows partition, the fan doesn't go as crazy, but it eventually will too.
Any idea what the problem could be? =s Or could it be that my MacBook can't handel 7200rpm hard drives =/ If so I'd probably downgrade to a 1TB WD blue =s
On top of that, does any one know if the 2.5" WD blue are as reliable as the 2.5" WD blacks? As I'm heistant to downgrade as I've read that the blues have a higher failure rate, and wouldn't want that happening. Oh and I'm not considering an SSD for this particular MacBook at the moment, as I may upgrade in another two years or so!
Thank you!
Edwin

Hey Mende1,
Well I guess I'll try returning the drive at the end of this week then my fan seemed to have slowed down abit since the upgrade, it's sorta spinning around 3000rpm now. I'm not sure if it's gonna be the same thoughout, and I'm pretty sure it doesn't spin as much as it did when I had my old HDD on. So I'm giving it a few more day probably till the end of this week. And if the noise issue still surfaces I'll try a different hard drive! and update you on the results!
Thanks alot Mende1!
And hello there rauldoppler!
Well, firstly, I'm using a early 2009 MacBook white! The pre-unibody one. It's running on a 2GHz Intel Core 2 Duo processor with 4GB for ram.
As for the hard-drives, I'd actually reccommend you to upgrade to an Solid State Drive if you can afford it, but if you're like me who needs more memory space then boot speed etc, I guess a HDD will be fine =) As for which brand of hard-drives, I would actually recommend WD (their black drives especially, 5 year warranty, 7200rpm speed hehe), but right now I'm having the fan problems, so I'm not too sure anymore.
I did however, do quite abit of digging around on the net and concluded that WD was a better choices amoungst the rest... But yeah the fan issue is still something I didn't expect. All in all, I guess as for which drive is better, it really depends on your needs or wants, if it's for casual internet surfing and stuff, a WD blue HDD would be fine, or a black if you want a slightly faster boot speed etc at the expense of your battery life and all. If you however value blazing fast boot times and application start up times, go for an SSD. If you need the memory space more then anything then I'd say go for a HDD again too, as it's cheaper interms of gigabite to dollar ratio. (for example, the older 500GB version of my new WD black would cost USD $43, while a Samsung 500GB SSD Pro would cost $349) Also, You could do abit of reading up on SSDs if you're interested in it There's alot of plus points to it, like ALOT, and if the price tag wasn't so huge, I would have used it for my macbook already!
Lastly, I used a WD Black 750GB for my macbook upgrade. However, I'm gonna downgrade to a WD blue 1TB this weekend if the fan doesn't settle down over time Cause well, the fan noise is really an issue for me.
Peace out guys!
Edwin

Macbook Fan Noise at Low RPMs

My Macbook makes an annoying buzzing noise when the fan is running at low rpms. It sounds almost like a motor running and is very irregular. If I use smc fan control to up the rpms to near 3000 this noise stops and becomes the usual noise for a fan running at higher rpms.
Is my fan broken or put in incorrectly? Is there anything I can do?

To add to Michael's statement. There is a 14 day window for returns. If you just got it return it and get a different one.

MacBook Pro's fans start running at high speed when the computer is asleep. Normal?

The other night, my MacBook Pro's fans started running at high speed when the computer was asleep. Loud enough to wake me up. And this just kept on going until I finally decided to turn the computer off. Is this normal? Is this anything to worry about?

This is not normal. See if a SMC reset solves the problem:
http://support.apple.com/kb/ht3964
Ciao.

Macbook pro fans running at 6200 rpm,running slowly and 35deg C?

About i week ago i was noticing significant slowdown in the operation of my mac. Yesterday the slowdowns were so much so as to render it useless.(30+seconds to realize that i had scrolled). I had just downloaded SOPHOS...it found nothing. so i assumed installing it had done something. i proceeded with a clean instal. After a few trys i was able to reinstall and boot up. The computer is functioning but not at the level of a wiped mac. there is still lag as i write this sentence, and at almost every action i see the pinwheel. I did a reset of the SMC and there are no hogs of CPU in the Activity Monitor(All programs). I downloaded a wiget to allow me to see temperature and fanspeed. the highest temperature is 35 degrees C and that is of the CPU, yet my fans are still posting speeds of 6204 rpm.
To make matters worse i'm overseas and cant seem to find information on a genius bar near me.(Toulouse France)
I feel like ive tried everything.
-Highfan speeds
-Laggy functioning (akin to a 5 year old PC).
Macbook pro
2.4 Ghz Intel Core Duo
4Gb 1067 MHz DDr3
Ive only had this this a year and a couple months(warrently just ran out) im prepared to have to pay to fix but has anyone had similar issues? any estimation on what it would cost?
I find it incredibly coincidental this happened the day steve jobs died....
Thanks for any help or advice you can offer.

Backup your files before doing anything. May be a dying hard drive, would account for slowness. Software update fully.
Perform a hardware test
https://support.apple.com/kb/ht1509
that should tell you if it's a bad sensor or something
And yes, perform another SMC reset because your symptoms are typical
Fans
The computer's fans run at high speed although the computer is not experiencing heavy usage and is properly ventilated.
Follow these instructions again
https://support.apple.com/kb/HT3964
Next try a Safe Mode boot holding Shift key see if it continues.
Next create a new user and log into it, then log into it under Safe Mode
https://support.apple.com/kb/HT1455
If it's isolated to one user, then there's something bad in there
Do a Restoring OS X 10.5 10.6. 10.7 - simple overwrite OS method
https://discussions.apple.com/message/16276201#16276201
Check your Flash here and update
http://flashbuilder.eu/flash-player-version.html
Run a malware scan with the free ClamXav
Run ALL of OnyX's cleaning and maintenance aspects and reboot
http://www.titanium.free.fr/

Macbook Pro Fans Running At High Speed

My MBP 17" CoreDuo 2.16ghz came back from having the Logic Board replaced at the weekend. All is well except that now the fans run at high speed all the time.
I have installed SMCFanControl, and the current readings are 45 / 113 degrees and the fans are running at 5500 rpm. I took the machine back to the Apple store but when I was there the fans didn't go above 3000rpm (typical huh?). It's nice that the case is now a lot cooler than it used to be but the fans seem very loud to me.
The question is, is this normal? I am not running anything very heavy duty at the moment. Any ideas?
Thanks
Matt

I tend to agree with Ned on SMC fan control (that it arguably causes more problems than it solves).
I had a similar problem with mine recently having the fans run constantly and at full speed. My temperatures never approached yours, but it would fail to go to sleep etc.
I would start with the advice Ned gave you. This is the same path Apple Care led me down in trying to resolve the issue.
Ultimately though I had to do an archival install of the operating system. It is non-destructive so it wasn't a big deal. I just had to slowly re-install patches and observe behavior. Oddly I was able to patch back up to 10.4.9 without the issue re-occuring so the root cause is still a mystery to me.
edit
Patch gone bad maybe? I tried re-applying the 10.4.9 combo before attempting the archival install route with no success. I know that has been suggested many times. Apparenty it solves many issues, but it failed to solve mine.

HT3964 My 2012 MacBook pro has a fan running on high from the moment I turn it on and my battery has an 'x' on it.someone please help.

My 2012 MacBook pro has a fan running on high from the moment I turn it on and my battery has an 'x' on it.someone please help.

You should contact AppleCare as soon as possible.
MBP is in warranty for 1 year from the date of purchase.
AppleCare: 1-800-275-2273.
Standard troubleshooting step for these kinds of issues is to reset SMC.
Reset SMC. http://support.apple.com/kb/HT3964

Macbook fan runs continually with Zynga games...

My wife reports that her Macbook fan runs continually when playing Zynga games...internet games in facebook. I watched her, and it's true...if she quits the game the fan stops. Is this a potential problem? Seems that's all she does on that laptop... I suggested she stop playing the games, but that advice will not be heeded:) thx.

Thank YOU for the reply. Wanna nother star? Help me figure this one out:
http://discussions.apple.com/message.jspa?messageID=10572587#10572587
as this one is with my machine and not my wife's and has me REALLY worried!

Fan running at high speed (iMac 2011)

I'm using an iMac mid-2011 model, 21.5". For the past few weeks, I'm facing an issue where the fan runs at high speed (>3900 rpm). This generally happens when I use the mac for more than an hour with simple tasks like browsing, checking mails, working on word / powerpoint, etc. If I play a game or watch a video, it happens faster in 15 - 30 mins.
I've tried SMS reset several times but it did not help.
I also ran the apple hardware test (extended testing) and got the following error:
4SNS / 1 / 40000000 : TS2p - 121.250
Could anyone help me understand what this error means?
Thanks.

There is a sensor error. That is most likely why you are experiencing the problem. Take it in for service.

Macbook fan running at high rpm when doing nothing

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