Fan constantly blowing on my iMac

Why is my fan constantly blowing on my imac

Now we know that the problem is caused by a process in OS X which is consuming all the CPU. This generates heat, that makes the fans work hard.
Open Activity Monitor, and choose "All Processes" in "Show" in the toolbar. Then, order the processes by CPU pressing the CPU button under the toolbar. Finally, telll us which processes are consuming more CPU

Similar Messages

VPN client using 50% of cpu, causing machine to run hot and fans constantly blow.

Anyone have any idea how to fix this? I have a Cisco VPN client to access the internet at school, and the process "vpnclient" is using ~51.6 percent of my cpu power. It's not using much "real" memory, but the computer is running pretty consistently at mid-high 70's C with the fans blowing at 6200 RPM constantly. I elevated it to try and get some airflow under it (even though i'm at a desk) and the temperature went down by a couple degrees, but not enough to stop the fans from blowing. I've only got Chrome, activity monitor, and finder open right now so I know the load on the computer shouldn't be bad enough to make the fans blow. Unplugging the machine makes the temperature go down pretty much instantly, but i've never had a problem with this before.
MacBook, mid-2008, 2.4 ghz with 4g of RAM.

Have you tried using the Tunnelblick VPN Client from google? Its a pretty decent piece of software which I run all the time from home, withouth any increase to to fan speed or temp
used on Macbook 2010 6GB Ram 2.4 core2duo nd Late 2010 MacBook Air

The fan on my brand new Imac Quadcore is blowing extremely loud. Is this normal

The fan on my brand new Imac Quadcore is blowing extremely loud. Is this normal?

I have the same problem on my 2010 IMAC 27" I7. Even if the mac is running at idle it occurs. It was already at the apple store for repair.
Later they told me, they found nothing with the hardware test so its not their problem?!!!
the activity monitors shows also nothing special, even the cpu's are at idle. No streaming or rendering, just working on the web or some normal documents...
I runned smcfancontrol to check whats going on. It seems that the onboard temperature sensor is measuring wrong instantly so they SMC thinks, its to hot/or not and then spinning up the fans to full power.
SMC reset is not really working, or just for some hours.
Can anybody else help?
Thx

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.

Jsut turned on my mac and the fan is blowing really hard is this a problem

I just turned on my mac and the fan is blowing in over drive is this a problem how do i fix it

Depends. We first need to know your iMAc model to know if your have a problem or a feautre. For a start, you can do "About this Mac" and tell us what it says about your Mac OSX version and processor type:

Fan Speeds and Temperatures 24" iMac 2.8GHz

What are the default fan speeds for a 24" iMac 2.8 GHz?
Also, what are the 'normal' temperatures for this computer?

The default iMac profile is the best for general use. For calibration get a Spyder 3 Pro: http://spyder.datacolor.com/product-mc-s3pro.php
George

Fan is blowing like **** after installing Yosemite on MBP (early 2011)

Problem description:
I installed Yosemite on my MacBookPro 13’ early 2011, the fan is blowing on high speed.
I tried the following:
I did SMC, also rebooted in safe mode, removed everything from spotlight, nothing seams to help.
In the activity monitor there are Dock, lsregister and Spotlight that together more than 300% of the cpu.
EtreCheck version: 2.0.6 (91)
Report generated 24 oktober 2014 15:16:30 CEST
Hardware Information: ℹ️
MacBook Pro (13-inch, Early 2011) (Verified)
MacBook Pro - model: MacBookPro8,1
1 2.7 GHz Intel Core i7 CPU: 2-core
8 GB RAM Upgradeable
BANK 0/DIMM0
4 GB DDR3 1333 MHz ok
BANK 1/DIMM0
4 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 3000 - VRAM: 512 MB
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 0:17:17
Disk Information: ℹ️
Hitachi HTS545050B9A302 disk0 : (500,11 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / [Startup]: 498.88 GB (167.77 GB free)
Core Storage: disk0s2 499.25 GB Online
MATSHITADVD-R   UJ-898
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/System/Library/Extensions
[loaded] VirtualAudioDriver (1 - SDK 10.6)
[not loaded] com.ZTE.driver.ZTEUSBCDCACMControl (1.1.2) Support
[not loaded] com.ZTE.driver.ZTEUSBCDCACMData (1.1.2) Support
[not loaded] com.wacom.kext.pentablet (5.2.1) Support
[not loaded] com.wacom.kext.wacomtablet (6.3.6b6 - SDK 10.8) Support
[not loaded] net.osculator.driver.OSCulatorIOKit (1.2.2) Support
Launch Agents: ℹ️
[loaded] com.adobe.CS4ServiceManager.plist Support
[loaded] com.google.keystone.agent.plist Support
[running] com.wacom.pentablet.plist Support
[running] com.wacom.wacomtablet.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.adobe.versioncueCS4.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.macpaw.CleanMyMac2.Agent.plist Support
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist Support
[invalid?] com.citrixonline.GoToMeeting.G2MUpdate.plist Support
[loaded] com.divx.agent.postinstall.plist Support
[loaded] com.facebook.videochat.[redacted].plist Support
[loaded] com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist Support
[loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist Support
[loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist Support
[running] com.spotify.webhelper.plist Support
User Login Items: ℹ️
Dropbox Application (/Applications/Dropbox.app)
Google Drive Application (/Applications/Google Drive.app)
Google Chrome ApplicationHidden (/Applications/Google Chrome.app)
FontExplorerXAutoload ApplicationHidden (/Users/[redacted]/Library/Application Support/Linotype/FontExplorer X/FontExplorerXAutoload.app)
EvernoteHelper Application (/Users/[redacted]/.Trash/Evernote (450845).app/Contents/Library/LoginItems/EvernoteHelper.app)
Internet Plug-ins: ℹ️
o1dbrowserplugin: Version: 5.4.2.18903 Support
WacomNetscape: Version: 2.1.0-1 - SDK 10.8 Support
Google Earth Web Plug-in: Version: 6.0 Support
Default Browser: Version: 600 - SDK 10.10
Flip4Mac WMV Plugin: Version: 2.4.0.11 Support
OVSHelper: Version: 1.1 Support
WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.2 Support
Silverlight: Version: 5.1.30514.0 - SDK 10.6 Support
FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
DivXBrowserPlugin: Version: 2.2 Support
WidevineMediaOptimizer: Version: 6.0.0.12757 - SDK 10.7 Support
Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
Gears: Version: 1.0 Support
CitrixICAClientPlugIn: Version: 11.2.0 Support
googletalkbrowserplugin: Version: 5.4.2.18903 Support
AdobePDFViewer: Version: 9.5.5 Support
iPhotoPhotocast: Version: 6.0
QuickTime Plugin: Version: 7.7.3
JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
User Internet Plug-ins: ℹ️
CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 Support
WebEx: Version: 1.0 Support
Safari Extensions: ℹ️
AdBlock
Pinterest
3rd Party Preference Panes: ℹ️
Adobe Version Cue CS4 Support
Citrix Online Plug-in Support
DivX Support
Flash Player Support
Flip4Mac WMV Support
Growl Support
Time Machine: ℹ️
Skip System Files: NO
Mobile backups: ON
Auto backup: YES
Destinations:
WD 3T [Local]
Total size: 3 TB
Total number of backups: 52
Oldest backup: 2013-05-25 18:11:16 +0000
Last backup: 2014-10-24 11:12:27 +0000
Size of backup disk: Excellent
Backup size 3 TB > (Disk size 0 B X 3)
Top Processes by CPU: ℹ️
      99% Dock
      95% lsregister
      71% Spotlight
      7% mdworker
      3% WindowServer
Top Processes by Memory: ℹ️
155 MB Google Chrome
141 MB Google Chrome Helper
103 MB Spotlight
103 MB Google Drive
94 MB Activity Monitor
Virtual Memory Information: ℹ️
1.70 GB Free RAM
4.61 GB Active RAM
786 MB Inactive RAM
1.49 GB Wired RAM
1.39 GB Page-ins
0 B Page-outs

Un-install CleanMyMac2. It may be the cause of the problems Software like this isn't required on Macs.
CleanMyMac2 Un-install
After un-installing, run thos program to make sure you got all the pieces.
EasyFind – Spotlight Replacement
Fans run - Mac notebooks - Spotlight
Try a SMC reset. The article covers when this is required, but doing this will not affect anything.
Reset SMC

My MacBook Pro Retina freezes 30 seconds after Startup and the fan constantly makes noise. How do I fix this?

My MacBook Pro Retina freezes 30 seconds after Startup and the fan constantly makes noise. How do I fix this?

Have you tried:
http://support.apple.com/kb/ht1379
and
http://support.apple.com/kb/ht3964

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

Full fans constantly on

I currently have a problem with my mini. First of all it had 10.5 installed on it with no problems. I decided to upgrade to 10.6 which working fine. After a couple of days I did notice that the sound was grayed out. So I went to system preferences to check and I could not change anything. Okay fine that didn't really bother me until my Bluetooth now was grayed out a few days later. So today I tried to reset the PRAM (Command, Option, P, and R) which did nothing. Okay so then I decided to reset the PMU. This is were the problem started with the full fans constantly on and will not turn off. So I tried resetting it a few more time and it still stays on. Now I did notice that if I put the machine to sleep which it does turn off the fans but know the sleep light does turn on anymore. Any ideas before I call apple care as I really don't want to do a reinstall.
Thx

Since you have an Intel Mini, you should have applied the SMC reset procedure, rather than the PMU reset procedure (which is only for PPC Minis).
A known side-effect of wrongly applying the PMU procedure to an Intel Mini is that the fans will run full blast.
The only possible fix is to apply the correct SMC reset procedure -- though this will not always fix the problem, since it appears in some small number of cases that applying the PMU procedure does permanent damage to the logic board of the Intel Mini.
The SMC reset is described here:
http://support.apple.com/kb/HT1543

Satellite L650 - Fan constantly at 90%

I have a L650. My cooling fan constantly cools at 90%, exept if I turn on the computer after a standby, then the fan does start at all! So for me its either 90% or nothing!
I have the newest BIOS, so that not the problem, and changing power management settings doesn't help either
Anyone have any ideas or is it just sending the computer back for repairs? The damn thing is only 5 month old :(

Its all original toshiba software. All drivers are updated including BIOS and GPU. I know its possibly to change power settings in windows, but its changes nothing, its still fanning at 90%... Except after a standby session, then the fan doesn't start at all, causing warnings and overheating... All in all, it doesn't matter what the core temperatures are, it keeps cooling at high fan speed.
Message was edited by: mbfab

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.

MBP Retina 15' fans constantly spinning up to 5k RPM

I recently got my new MBP 15' Retina with the following specs: 2.7 Core i7 with 16GB, 1600 MHz RAM. I use office for mac (outlook and powerpoint mostly) and a lot of Safari (1-2 windows, up to 7 tabs at most). I don't play any games on this machine, nor do I use high memory intensive apps like FinalCut and the like. I got Sophos anti virus running in the back, I occasionally use parallels with Win7 (very rarely) and other than that I virtually got no memory intensive programs running. Average temps according to iStat: 33-50
Yet my machine's fans constantly speed up to around 5k RPM (both fans) for about half a minute and then cycle back to ~2k RPM for about 10 minutes. This continues throughout the entire day.
I have the latest software version (10.8.2) and I already tried resetting SMC (shut down, adapater plugged in, Shift+Control+Option+Power button - release at once, start up). No difference. Still the same issue.
Ideas anyone?

2,000 rpm is the normal state for the fans - it's not high at all (mine can go up to 6,000+ rpms and I can hear them then).
Your fans are always going to be running and around 2,000 rpms is about as low as it gets.
Clinton

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.

Fan constantly blowing on my iMac

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