IMac Fan constantly running OS X Yosemite Version 10.10.1 (14B25)

Does anyone have this problem my iMac is going to be about a 1 1/2 year old now and the fan is constantly running and never shuts off. This happened from day one took it back to Apple store when first notice the problem which was 1 week later. They told me it was nothing and all iMacs run the fan and do not get to much concern. He did something like unplugging the cord and pressing the power button 2 times holding down for 10 sec each time he said had to reset pram or something like that. It went away for a day and came back tried his procedure and works once or twice and back come on the fan all day. But when in sleep mode goes off. But when on you can feel the air out of back coming out. Is thee anyway to stop it someone told me maybe the motherboard was going or the ram was bad but the Apple tech was I think honest with me he said they have these issue's and there is really nothing to do with the fan noise.The computer is not hot at all to touch and he told me thats when I really have to worry then if it feels hot to touch then shut it down and wait till next day to turn back on. I do not know what to make out with this issue. Anyone know of a fix for this that I can do? There is nothing blocking the computer is wide open only have a cable modem on the side next to printer. I just want piece and quite again thats why I bought a Mac. My pc windows 7 never did this and my laptop never did this either never saw anything like this until I got my very first Mac. Little upset with Apple support they are useless and did not even offer me a new one when I went back a week later they were very rude to me I paid $1299.00 for nosey machine and no help.I am a very frustrated Mac user and thats why I do not own a Apple phone I like Android much better and cheaper than Apple products and from what I have read about the new phone software being so bad even with the updates that another reason I will never have a iPhone. So any help with my fan will be a great help sorry for venting on here.I do apologize for that but need to vent as my fan is driving me nuts. Thank you all

franick01 wrote:
Do you know of any free ones that I can keep that are good?
In a word no. I keep hoping for better low price offerings in the App store, but Marcel Bresink eschews the App Store and the relatively cheap temperature reporting apps I have found there do not report fan speed which in your case, and I suspect many, is critical. Be aware that due to manufacturing tolerances some fans are simply noisier than others.
For what it is worth the fan in my late 2012 Mac mini is currently spinning at around 4,700 RPM and I all I can here is a faint sound of moving air. I get more noise from the fan in my external HD/optical drive enclosure when burning a CD/DVD which of course generates a lot of heat.

Similar Messages

IMac fan constantly running, I've tried everything!!

Hi,
I have a Mac (21.5-inch, Mid 2010)
Processor: 3.06 GHz Intel Core i3,
Memory: 4 GB 1333 MHz DDR3,
Graphics: ATI Radeon HD 4670 256 MB,
Running Yosemite 10.10.1
The fan is constantly running quite loud. I have never had this problem until recently and it seems to have started doing it for no apparent reason. I have changed any settings or done anything recently. In fact, the most recent change was upgrading to Yosemite.
I have tried doing a SMC reset (several times) which didn't change anything. I have tried lots of doing different ways of doing a Apple Hardware/Diagnostics Test and it told me that "The Apple Hardware Test is not compatible with this machine".
I have kept a close look at my Activity Monitor and nothing is spiking, average use is: System 2.75%, User 5.67%, Idle 90.4%
Using smcFanControl I know the fan is running at 29C and average 996rpm. I don't know if those stats are normal or not, but my fan is still making more noise than it ever has.
Please, can somebody help! I have been trying for weeks now with no success. I very worried that using my Mac is going to damage something and I desperately need it for work. Can anybody suggest anything outside of taking it to apple because that is my last resort which is going to cost me a lot of money
Thank you in advance for your help

The fans always run, that's normal. What's not normal is that you hear them as much as you do unless you use your imac in an EXTREMELY quiet environment. I think that 996rpm is actually lower than normal, you shouldn't hear that at all. Maybe you have a fan that's starting to fail and is making abnormal noise.
Running the Apple Hardware Test on your mac requires the original gray install discs that came with the computer when it was new, do you have those? AHT is on disc two, insert it and hold D at start up and AHT will start.

Cooling fans constantly run @ full speed after replacing the upper CPU??

After replacing the upper CPU on a Power Mac G5 (June 2004), Dual 1.8Ghz PowerPC, model M9454LL/A, all the cooling fans constantly run at full speed. All other operations are normal.
I've read, "...after replacing or switching CPU locations the Logic Board doesn't properly recognize the CPU's in their new location and a "Thermal Calibration" is needed". Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
What software would be required?

Hi-
Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
Yes.
What software would be required?
The Apple Service Diagnostic disc (ASD) of the proper version for your machine.
Call an authorized Apple service provider and arrange a calibration, as the disc is not readily available to individuals.

I'm running OS X Yosemite, Version 10.10 My Adobe Illustrator CS6 is not opening. I have install the legacy Java SE 6 runtime, not working

I'm running OS X Yosemite, Version 10.10 My Adobe Illustrator CS6 is not opening. I have install the legacy Java SE 6 runtime, not working
Also when I click on More Info... button I I get support.apple.com website page, which is blank. When I click on the OK button, same result.
I need help with this, is anyone out there experiencing the same phenomena?

How about this one
Apple Java for Mac | MacUpdate
or
Java for OS X 2014-001

IMac fan keeps running despite resetting the SMC

My iMac fan keeps running loudly even when the computer isn't doing any thing, and I just started it up.
I have tried resetting the SMC and that didn't help.
I also recently had to insert a new hard drive instead of the old one that failed. I am thinking that either the SSD is just hotter than the old hard drive, or that the hard drive sensor is somehow inverted in the plug. Is there any way of testing the hard drive sensor to see if that is faulty, or to test the fan. When I look at the Activity Monitor the system is 87% idle...

Although you don't mention which imac you have since 2009 Apple has used hard drives with the temp sensor built in. When replacing one of these late model drives you have to use the same type hard drive or you get fans running all the time because the temp sensor isn't detected. You might want to try some third party software such as iStat Menus, SMC Fan Control or HDD a Fan Control. Google them for reviews.

My mid-2012 MacBook Pro has the fan constantly running. As soon as I turn it on. My MBP won't even be hot and the fan is running. How can I fix this?

My mid-2012 MacBook Pro has the fan constantly running. As soon as I turn it on. My MBP won't even be hot and the fan is running. How can I fix this?

If you are still under warranty and/or have AppleCare, call them. Let them deal w/it.
OOW try the following: http://support.apple.com/kb/HT1411 Apple Portables: Resetting the System Management Controller (SMC)

Fans CONSTANTLY running after installing Mavericks

So yeah - Fan constantly running after installing Mavericks.
NOT HARDWARE... tell me it is and ill lose my mind... I used to be an Apple Tech.
Erased and REINSTALLED Mountain Lion = RESOLVED
Reinstalled Mavericks = PERSISTS
REINSTALLED Mountain Lion = RESOLVED
--AWAITING OS FIX---
MACBOOK PRO 2009, 750GB HD, 8GB RAM

So yeah - Fan constantly running after installing Mavericks.
NOT HARDWARE... tell me it is and ill lose my mind... I used to be an Apple Tech.
Erased and REINSTALLED Mountain Lion = RESOLVED
Reinstalled Mavericks = PERSISTS
REINSTALLED Mountain Lion = RESOLVED
--AWAITING OS FIX---
MACBOOK PRO 2009, 750GB HD, 8GB RAM

Thunderbolt display running OS X Yosemite Version 10.10.2 acts weird

I have a MacBook Pro (Retina, 15-inch, Late 2013) connected to a Thunderbolt display running OS X Yosemite Version 10.10.2. I am using Photoshop CS5 Extended Version 12.0.4 x64.
About 3 weeks ago when I opened a file and tried to move it up to the Thunderbolt display to enlarge it and make it easier to work on, it disappeared. This had never happened before. Now all PS files behave this way.
This doesn’t happen with any other apps on the computer including all the other Adobe apps I use.
[email protected]

I have similar problem Thunderbolt Display, Yosemite 10.10.2, but Photoshop CC 2014. sometimes I can quit PS and then it will work - or if I launch PS from the toolbar on the TB display, but today I can literally drag it from my Laptop where the file is visible to my TB display and the image disappears. I've even relaunched PS with all the preferences reset and that got it to work one time that it happened but I've only had the computer and PS for 2 weeks so its not like that much could have changed or gotten messed up in that time right? did you find any solutions?

IMac mid 2007 Runs Slow on Yosemite, unresponsive

PLEASE CAN YOU ADVISE:
I have been visiting my Dad and two days later his computer (it seemed after a power cut) now RUNS VERY slow, it is unresponsive when clicking on any application on the menu bar, or even the finder bar, it shows spinning ball. I read your forum and will paste the Etrecheck results here. He has tried the pram thing on startup but still no good. He has iMac 20 inch Mid 2007. Yosemite 10.10.2., 2.4 Ghz Intel Core 2Duo, mem 2 Gb 667 Mhz DDR2 Sdram. Startup disk iMac, Graphics ATI Radeon HD 2600 Pro 256mb.
Report from Etrecheck.
EtreCheck version: 1.9.15 (52)
Report generated February 21, 2015 at 11:10:48 AM EST
Hardware Information: ?
    iMac (20-inch, Mid 2007) (Verified)
    iMac - model: iMac7,1
    1 2.4 GHz Intel Core 2 Duo CPU: 2 cores
    2 GB RAM
Video Information: ?
    ATI,RadeonHD2600 - VRAM: 256 MB
        iMac 1680 x 1050
System Software: ?
    OS X 10.10.2 (14C109) - Uptime: 0 days 1:3:1
Disk Information: ?
    Hitachi HDT725032VLA360 disk0 : (320.07 GB)
    S.M.A.R.T. Status: Verified
        EFI (disk0s1) <not mounted>: 209.7 MB
        lMAC (disk0s2) / [Startup]: 319.21 GB (189.2 GB free)
        Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information: ?
    Apple, Inc. Keyboard Hub
        Apple, Inc Apple Keyboard
    Apple Inc. Built-in iSight
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    Apple Inc. Bluetooth USB Host Controller
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User Internet Plug-ins ?
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Given the circumstances I agree taking it to an Apple Store might be the best way to address the problems with it. Manually eradicating all the software contributing to its unacceptable performance will be time-consuming and tedious. If it were mine there is no question I'd erase it and reconfigure it from the ground up. That would be less time-consuming and more likely to be successful, but it's also tedious.
And I do agree with a previous respondent that he could use some more RAM.
So do I. 2 GB is the absolute minimum for Yosemite to even run, and it won't run well with that little. That Mac can address as much as 6 GB, which would probably be acceptable if you were to reconfigure it and leave out the garbage software causing and / or contributing to poor performance.
Lastly, you have to evaluate how much time and money you are willing to spend on a Mac that's nearly eight years old. Age itself doesn't kill Macs, but eight years is about as much economic life that can be expected from any computer. Among the limitations that cannot be overcome are its Core 2 Duo CPU and RAM. Even 6 GB memory isn't all that much any more.
Having said that, even a brand new fully configured top of the line Mac Pro would run poorly, if at all, given the software that's on your Dad's Mac. Intego, Norton/Symantec, MacKeeper, Cocktail... all that stuff is utter garbage and there is too much of it to mention. Personal testing of Intego alone on a brand new Mac containing nothing other than one minimally configured user account resulted in performance degradation so extreme no knowledgeable Mac user would consider it acceptable.
For reference, here is the procedure I would recommend:
Back up your Mac if you have not already done so. To learn how to do that read Mac Basics: Time Machine backs up your Mac. You will need a suitable external hard disk drive for this purpose. One with adequate capacity can be purchased for about $60.
The recovery procedure will require that you erase the Mac using OS X Recovery, and then create a new user whose contents will be empty. You will then be able to use Setup Assistant to migrate your essential documents including photos, music, work products and other essential files.
When doing so, select only your previous User account and do not select "Applications", "Computer and Network Settings" or "Other files and folders". De-select those choices.
Subsequent to using Setup Assistant, you will need to reinstall the essential software you may require, once again remembering to install software only from their original sources, and omitting all non-essential software.
Always obtain software from authorized sources such as the Mac App Store, original installation media (CD or DVD), or from the developer's authorized download source. Never obtain software from download aggregator websites such as C net dot com, Mac Update dot com, Soft onic dot com, random popups that may appear while browsing the Internet, or other sources that primarily rely upon junk product advertisements for their revenue. Such sites are not to be trusted, and are the most common means of distributing adware or other junk you probably do not want.
To erase and install Yosemite read: OS X Yosemite: Erase and reinstall OS X
To migrate your essential documents read: OS X Yosemite: Transfer your info from a computer or storage device and follow the procedure under Transfer info from a Time Machine backup or other storage device.

Fan constantly runs when the computer is in use, as soon as I turn it on, the fan starts up, help?

Does anyone know what might cause the fan on my mac to run constantly? As soon as I turn it on and the unit is clearly not warm yet, the fan is going.

If your iMac has an Intel processor, reset the SMC:
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Apple says that should fix a fan that runs regardless of systems load. If that doesn't fix it, please post back.

MacBook Fans Constantly Running

The fans on my MacBook pro are constantly running. This morning I turned it on and they started up within the first 5-1o minutes of using the machine.
Has anyone else had problems with this? I have two other co-workers who are doing the same amount of activity I'm doing and we have the same exact hardware set up, but they aren't having any problems.
Help!
Thanks!

Have you been monitering Activity Monitor as I suggested to see if an application is causing the problem?
I would also suggest using a utility such as TinkerTool System to erase system, user, and font caches in case the problem is caused by a corrupted cache file. Restart after clearing caches. Also use the utility to run the Unix maintenance scripts. See the following for more on maintenance:
Kappy's Personal Suggestions for OS X Maintenance
For disk repairs use Disk Utility. For situations DU cannot handle the best third-party utilities are: Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible. TechTool Pro provides additional repair options including file repair and recovery, system diagnostics, and disk defragmentation. TechTool Pro 4.5.1 or higher are Intel Mac compatible; Drive Genius is similar to TechTool Pro in terms of the various repair services provided. Versions 1.5.1 or later are Intel Mac compatible.
OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep. Dependence upon third-party utilities to run the periodic maintenance scripts had been significantly reduced in Tiger and Leopard.
OS X automatically defrags files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems.
I would also recommend downloading the shareware utility TinkerTool System that you can use for periodic maintenance such as removing old logfiles and archives, clearing caches, etc.
For emergency repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the commandline. Note that presently AppleJack is not compatible with Leopard.
When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. PsynchX 2.1.1 and RsyncX 2.1 (Freeware)
6. Carbon Copy Cloner (Freeware - 3.0 is a Universal Binary)
7. SuperDuper! (Commercial)
8. Data Backup (Commercial)
The following utilities can also be used for backup, but cannot create bootable clones:
1. Backup (requires a .Mac account with Apple both to get the software and to use it.)
2. Toast
3. Impression
4. arRSync
Apple's Backup is a full backup tool capable of also backing up across multiple media such as CD/DVD. However, it cannot create bootable backups. It is primarily an "archiving" utility as are the other two.
Impression and Toast are disk image based backups, only. Particularly useful if you need to backup to CD/DVD across multiple media.
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
Additional suggestions will be found in Mac Maintenance Quick Assist.
Referenced software can be found at www.versiontracker.com and www.macupdate.com.
It also can't hurt to do this:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

Fan constantly running loud - iStat reporting 0 rpm

Hi guys,
hope somebody can help me, my iMac suddenly started to make a very loud noise, the fans are spinning at high RPM!
I already tried to reset the SMC, unplugged my Mac for a couple of hours, plugged it in while pressing the power button - unfortunately nothing helped. When starting while holding the power button, it gets even noisier, therefore i expect only one of the fans is running at full or near full speed constantly.
I now tried to install some hardware monitors to check on temperature/fan speed. iStat nano is reporting low temperatures, but the strange thing is that it gives 0 rpm for the CPU fan, even though its clearly running at high revs...
I don't have Apple care and my iMac 24" is now roughly two years old. Any help is highly appreciated!
thanks,
A

Try doing a SMC AND PRAM reset by:
1. Turn off your iMac and unplug everything from it for 30 seconds.
2. Plug in the power cord, keyboard and mouse only.
3. Press the power button and immediately hold down the Option, Command, P & R keys until you hear the second gong then release the keys. Your machine will start up normally, then check for the issues you are having.

Why does the fan constantly run

my fan on my macbook pro is constantly running today? any answer as to why

Hi Julian,
MBPs run very warm. The fans run to cool the CPU etc. The warmer it gets on the outside, the harder it is to keep the inside cool. There can also be issues causing the MBP to run warmer than usual.

Fans constantly running, SMC reset failed to solve it.

My fans currently run on high constantly. I tried the SMC reset (both unpluging the machine and reset button) and the fans are still going. Is there a fan calibration or something else is wrong? I had my Mac tech install more RAM and a week later this happened. Not sure if this is in relation with that.
According to iStat:
Temps
HD 83*
ST3500 88*
ST3500 88*
CPU A 259*
CPU B 259*
Ambient 70*
HD Bay 72*
HD Bay 70*
Fans
Exhaust 2777 RPM
CPU Fan 2813RPM
Power Supply 599RPM
HD/Expansion 2841RPM
Message was edited by: JTA411

That is what iStat was saying. I could have cooked a pizza if it was truly that hot. Fortunately the SMC just needed a reset. Not sure who writes those fix it help pages but disconnecting everything for 15 seconds didn't work. Perhaps they meant 15 minutes?

Fan constantly running

Since uploading Windows 10 the fan now runs constantly and pretty hot too. I have it propped up to allow air underneath but makes no difference. Is this a coincidence (since uploading Windows 10) or is there a problem with the laptop?

Hi , Welcome to the HP Forums! It is a fantastic place to find answers and suggestions!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide. Learn How to Post and More I grasp that after updating to Windows 10 the fan runs constantly and the notebook get very warm. Here is a link to HP Notebook PCs - Fan is Noisy and Spins Constantly, PC is Warmer than Normal that should help. Have you done all your Windows updates? Here is a link to Open the Windows Update troubleshooter that may help find additional drivers. Although it lists Windows 7 it does work in Windows 10. Once launched, it should show a screen like this. Use the second option "Background Intelligent Transfer Service", it should lead to a force update of 'Windows Updates' that may not be automatically being applied, that could fix some of these issues. Should you require a bios update here is a document to assist you.HP Notebook PCs - Updating the BIOS As updating the bios does have a potential to cause damage, I suggest contacting HP support for assistance.Please contact HP support at Contact HP SupportAnother one that may help is HP Notebook PCs - Reducing Heat Inside the PC to Prevent Overheating. To say thanks for replying please click the thumbs up button below.If this overcame your issue, please notify people by choosing solution provided. Best of Luck!

IMac Fan constantly running OS X Yosemite Version 10.10.1 (14B25)

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