IMac fan won't stop running after Mavericks install

My fan seems be running all the time, in sleep mode and shut down (when power cord is plugged in).
This started after installing Mavericks??????????????????????????????? HELP.

I have the same issue with my 2012 iMac 2.7 Intel Core i5 21.5"
The iMac fan runs constantly immediately when it is shut down and after a minute or so when it is put in standby.
This iMac just started doing this.
I have done the SMC reset numerous times and also the PRAM and DVRAM reset by hitting the Command, Option, P, and R after restarting.
This issue is beyond frustrating as the only way to shut off the fan ever is to pull the power cord.
Any additonal help would be appreciated.

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If you note that your Mac fans don't work correctly, do a SMC reset > http://support.apple.com/kb/HT3964

Fan won't stop running

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I had a hard drive that kept corrupting files (not the original HD, been replaced once by apple) so I replaced it with a new (ish) 1 Tb WD green. But after I did this my fan won't stop running. I thought I had disturbed the HD temp sensor so I opened it back up again and made sure it was properly on the HD closed it but still constant fan.
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Can anyone tell me if these readings are normal? Are any high that would be causing my fan to stay on?

Um, OK. I've just realized that the fan isn't running any more, and I've been using it for a couple of hours. I'm not sure if I should do anything else or just not look a gift horse in the mouth. Anyone have an opinion?

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Please return to your System Profile and make sure that all of your information is Correct. It is hard for the users on these fourms to dtermine your problem unless all of your Information is UP TO DATE.
Your MacBook Pro doesnt use. iOS7.4 this is for Phone not your Macbook Pro.
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Installed Mavericks day 1 of the public build on App Store and ever since my Mac will just randomly shut down and not let me power it back up. Only has happened when browsing the web and after shut down I have removed power cord from iMac and wall, and also tried different outlets and nothing the first two times I was able to get it back up and running after about 20 minutes of it just being off. Third time it happened I was not so lucky, made an genius appt and they ran diagnostic test and checked power cord and it of course worked fine for them, took it home and booted instantly... Now 24 hours later it just shut off again and no luck getting it going. Suggestions please or should I schedule another appt and have them send it in?

Installed Mavericks day 1 of the public build on App Store and ever since my Mac will just randomly shut down and not let me power it back up. Only has happened when browsing the web and after shut down I have removed power cord from iMac and wall, and also tried different outlets and nothing the first two times I was able to get it back up and running after about 20 minutes of it just being off. Third time it happened I was not so lucky, made an genius appt and they ran diagnostic test and checked power cord and it of course worked fine for them, took it home and booted instantly... Now 24 hours later it just shut off again and no luck getting it going. Suggestions please or should I schedule another appt and have them send it in?

Installed Firware Update on my iMac, now the fan won't stop running.

I successfully installed the firmware update on my 20" Intel Core Duo 2 iMac. Everything was fine, it restarted all was working until I put it to sleep. This is when the fans came on and never turned off. I tried to reset the SMC by following the instructions to unplug everything and the power. I even left it overngiht unplugged. But now the fan is on high all of the time. It never even changes pitch like its stuck at one speed. I'm waiting for the applecare line to open at 9AM EST.
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I'll let you know how it goes.

Yes, I checked to make sure that the Firmware and EFI were the correct versions. We did an SMC reset, a PRAM reset etc. They replaced the iMac I just brought home a new machine. They couldn't figure out what was wrong with it either. The fan was running even after you put it to sleep. So they just replaced it. It will go into the refurbished line now.
As an FYI the Mac Genius told me, so take it with a grain of salt, that they have so many swaps on the new Intel Core 2 Duo machines that they have been shipping out almost as many as coming in. They have become so good at doing swaps in the 5th avenue store that they had us turned around in 5 mins.
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Word '08 won't run after Mavericks install

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Try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode
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Loud fan, won't stop running at 6000 rpm.

So I'm a first year law student and had my 2010 macbook pro stolen from me 2 weeks ago at school and with exams + finals coming up I desperately needed a new computer fast. I only had $600 and wouldn't settle for a PC so I chose to buy a used macbook from a random guy on craigslist. I bought a late 2007 15" macbook pro that has snow leopard running on it and for some reason the fans are quite noisy. Normally I would take this issue to the apple store but I obviously don't have applecare on this. The previous owner had installed smcFanControl on it, which I hear usually does more bad than good... now I have no idea how to make the fans quieter, adjusting the speed only works temporarily. This is the 3rd mac I've owned and I recall my first mac being somewhat noisy too after a few years but not this bad. It's become impossible to use my computer in lectures or the library without getting death stares from people trying to concentrate, any help/advice is much appreciated! Thanks.

I'd try uninstalling smcFanControl and then doing a SMC reset to set things back to normal.
http://support.apple.com/kb/HT3964
Regards,
Captfred

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Good evening.
About a week ago, my G5 went dead - no power at all. An Apple certified tech that I know came to my house yesterday to replace the power supply with one (600W version) that I ordered.
That got me up and running, but ever since then, ALL my fans have been running at high speeds nonstop. I looked to see if there is a firmware update and tried resetting the CUDA again - same results. Tried setting processor speed to reduced, even tried it on highest - same result. Only way I can get them to stop is to to the computer to sleep or shut it off. The fans were never like this before. Any ideas? This is quite bothersome. Thanks for your time.

Hi eightfifteen-
Greetings and welcome to the Apple Discussion boards
I would agree with samsara that the thermal calibration should be performed. It is also quite possible that a thermal sensor was somehow left disconnected and is causing one or two particular fans to spin out of control.
The tech that you know should have performed the calibration while checking to ensure that your system was operating correctly. Have the tech come back with the proper software tools and do not let this person leave until it is demonstrated to you that your system is working correctly.
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Hrm looks like I might of fixed it. I went back after seeing another post about spamming drutil commands to "wake up" the drive and just spammed them about 20 or so times and the drive started working again.
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You have to run the update for AE. You may have to use the uninstaller and then re-install. I'm guessing that this started after you ran an update for your OS.
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lisagrice wrote:... I also have performed all of the suggestions given here:
http://discussions.apple.com/docs/DOC-6431 already.
You cannot have done everything recommended in the https://discussions.apple.com/ docs/DOC-6431 tip.
One of the suggestions from the How to Troubleshoot iSight link included in the tip is to "... contact Apple or an Apple-Authorized Service Provider for service." (MBP link added here.)
Unless you decided that the estimated repair cost is prohibitive, they would have made your Mac work properly.
Message was edited by: EZ Jim
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Fan won't stop on my iMac

I have a 2011 iMac (21.5") and the fan won't stop running at full blast. I've spoken with Applecare support, and done all the steps... Which were:
1) SMC reset - performed three times
2) PRAM reset
3) Left the computer off overnight
4) Checked activity monitor - Nothing is open, and the actual activity monitor was the process taking up the most CPU, which was only 2%.
5) My hard drive is nowhere NEAR full - I still have 400GB/500GB available.
The computer functions properly, but the fan is just going non-stop. What could the issue be? I will definitely have to bring this in to the genius bar, but this is my father's computer and he isn't available during business hours to take this in. Does anyone know what this could be? Thanks for the help.

Try running the Extended Apple Hardware Test to see if it has a hardware (thermal sensor or SMC) problem. It won't fix the problem, but it may help you understand and guide the service tech to the problem.

IMac fan won't stop running after Mavericks install

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