Macbook fan keeps running, won't sleep or hibernate

So here's the deal, my macbook (late 2008 aluminum) fan is always running loudly, from 4500-6000 rpm, and the temperature stays around 80ºF even if the computer is idling. I have to shut it off for the fan to turn off. When I close the lid, the screen shuts off, but the computer won't sleep, even if I choose sleep from the apple menu. I tried unplugging the power and letting the screen turn off, thinking it would hibernate, but it will not hibernate either. I made sure there is no dust in vents or anything, tried SMC reset, installed latest software, am running SMC fan control, nothing seems to be working. I'm running Mountain Lion 10.8.3. and my activity monitor shows no unusual activity. It does feel hot, so I don't think the heat sensor is off, it is just heating up and won't cool down. Could the fan be running poorly and not cooling properly? Please help.

There's a log in Event Viewer. It might have the issue logged.
Does uninstalling the Power Management driver and reinstalling v1.62 help?
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

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Why My Macbook Pro 13" so slow and the fan keep running when I sleep mode my mac? This problem make my mac battery become low when I sleep mode it. I've been using EtreCheck and here the result. Anyone know how to solve my mac problem?

Hardware Information:
          MacBook Pro (13-inch, Mid 2012)
          MacBook Pro - model: MacBookPro9,2
          1 2.5 GHz Intel Core i5 CPU: 2 cores
          4 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: 1024 MB
System Software:
          OS X 10.9.2 (13C64) - Uptime: 0 days 1:15:23
Disk Information:
          APPLE HDD TOSHIBA MK5065GSXF disk0 : (500.11 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) / [Startup]: 499.25 GB (474.03 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R   UJ-8A8
USB Information:
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Computer, Inc. IR Receiver
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Launch Daemons:
          [System] com.adobe.fpsaud.plist 3rd-Party support link
          [System] com.microsoft.office.licensing.helper.plist 3rd-Party support link
          [System] org.macosforge.xquartz.privileged_startx.plist 3rd-Party support link
Launch Agents:
          [System] org.macosforge.xquartz.startx.plist 3rd-Party support link
User Launch Agents:
          [not loaded] com.google.keystone.agent.plist 3rd-Party support link
User Login Items:
          None
Internet Plug-ins:
          SharePointBrowserPlugin: Version: 14.0.0 3rd-Party support link
          FlashPlayer-10.6: Version: 13.0.0.201 - SDK 10.6 3rd-Party support link
          Flash Player: Version: 13.0.0.201 - SDK 10.6 3rd-Party support link
          QuickTime Plugin: Version: 7.7.3
          Default Browser: Version: 537 - SDK 10.9
Safari Extensions:
          FastestTube: Version: 2.2.1.7
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
3rd Party Preference Panes:
          Flash Player 3rd-Party support link
Old Applications:
          None
Time Machine:
          Time Machine not configured!
Top Processes by CPU:
               5%          WindowServer
               5%          com.apple.WebKit.Networking
               3%          Safari
               1%          EtreCheck
               0%          systemstatsd
Top Processes by Memory:
          229 MB          com.apple.WebKit.WebContent
          139 MB          Safari
          123 MB          com.apple.IconServicesAgent
          53 MB          Finder
          48 MB          WindowServer
Virtual Memory Information:
          1.56 GB          Free RAM
          1.55 GB          Active RAM
          319 MB          Inactive RAM
          588 MB          Wired RAM
          278 MB          Page-ins
          0 B          Page-outs

You certainly don't have any third-party software that's causing your sluggishness.
Sometimes, a failing hard drive can cause sluggish behavior, however.
Boot into your Recovery partition (hold down the command and R keys whilst booting) and once at the Recovery screen, select Disk Utility. Select your hard drive (in your case, the aptly named "Macintosh HD") and click on the "Verify" button. If you get green text telling you that everything appears to be OK, then it's not your hard drive slowing things down. If you get red text telling you that the disk needs to be repaired, click on the "Repair" button. If the disk can be fixed, it will be. If not, call back.
Clinton

Help! MacBook fan keeps running after shutdown!

Twice since getting my MacBook a month ago, I've shut down the computer and put it in its carrying case, only to later notice it still emitting heat and its fan running a couple of hours later.
None of the power indicator lights is on. I could neither get it to start up or shut down (even after holding down the power button for over 5 seconds). The only way I could jolt it awake was to plug in its power adapter and then turn it on.
One random factor that I haven't willingly checked is that this may be happening when I close the screen immediately (1 second) after shutdown is complete. Maybe I'm jolting it before it completely shuts down?
Anyone else having this problem? And has anyone found a solution? I hope I don't have a dud here.
MacBook (Intel) Mac OS X (10.4.6)
MacBook (Intel) Mac OS X (10.4.6)

I've had this too.
You need to let it all shut down completely before you close the screen or move it. Don't just let the screen go black - you need to make sure everything has stoped moving etc. It seems to be a bit tempermental about this! Apparently it gets confused if you shut the lid too quickly and tries to sleep instead.
After making sure I shut down properly I haven't had the problem again.
Hope that helped.
Macbook 1.83GHz 1GB Mac OS X (10.4.7)

Macbook Pro keeps randomly going to sleep.

My OS Lion Macbook Pro keeps randomly going to sleep.
There doesn't seem to be any pattern. It looks like I may have to get it repaired?
Error report:
Anonymous UUID:                    FAD976F2-BE76-43AB-BBA1-C958CBF03B63
Sun Aug 21 23:30:34 2011
panic(cpu 0 caller 0xffffff7f809962bf): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0xffffff8115b07000 0x0a5480a2, D0, P3/4
Backtrace (CPU 0), Frame : Return Address
0xffffff81158232b0 : 0xffffff8000220702
0xffffff8115823330 : 0xffffff7f809962bf
0xffffff81158233c0 : 0xffffff7f80a863fc
0xffffff8115823410 : 0xffffff7f80a864bc
0xffffff8115823470 : 0xffffff7f80d30749
0xffffff81158235b0 : 0xffffff7f80aa5519
0xffffff81158235e0 : 0xffffff7f8099fc4a
0xffffff8115823690 : 0xffffff7f8099b54c
0xffffff8115823880 : 0xffffff7f8099d151
0xffffff8115823960 : 0xffffff7f8184e008
0xffffff81158239a0 : 0xffffff7f8185ce06
0xffffff81158239c0 : 0xffffff7f818786d4
0xffffff8115823a00 : 0xffffff7f81878739
0xffffff8115823a40 : 0xffffff7f81860c51
0xffffff8115823a90 : 0xffffff7f81818753
0xffffff8115823b10 : 0xffffff7f818171c4
0xffffff8115823b40 : 0xffffff7f8181cbfd
0xffffff8115823b70 : 0xffffff800065259d
0xffffff8115823be0 : 0xffffff800065293c
0xffffff8115823c40 : 0xffffff80006530e0
0xffffff8115823d80 : 0xffffff80002a3738
0xffffff8115823e80 : 0xffffff8000222ff6
0xffffff8115823eb0 : 0xffffff8000214829
0xffffff8115823f10 : 0xffffff800021bb58
0xffffff8115823f70 : 0xffffff80002ae380
0xffffff8115823fb0 : 0xffffff80002d83a3
      Kernel Extensions in backtrace:
         com.apple.NVDAResman(7.0.4)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f809 36000->0xffffff7f80c0cfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffff ff7f808c2000
            dependency: com.apple.iokit.IONDRVSupport(2.3)[E99C8907-946D-3F1A-A261-4C0F2D5D0451]@0xffff ff7f80924000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3)[897EB322-FD55-36D7-A68E-9E9C34A74A84]@0xf fffff7f808ec000
         com.apple.nvidia.nv50hal(7.0.4)[2E84958C-1EEC-316B-9F7A-68C368F83476]@0xffffff7 f80c0d000->0xffffff7f80f2efff
            dependency: com.apple.NVDAResman(7.0.4)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f809 36000
         com.apple.GeForce(7.0.4)[6F2B5A22-F2F2-34A6-9721-8011B1E03300]@0xffffff7f817ff0 00->0xffffff7f818bbfff
            dependency: com.apple.NVDAResman(7.0.4)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f809 36000
            dependency: com.apple.iokit.IONDRVSupport(2.3)[E99C8907-946D-3F1A-A261-4C0F2D5D0451]@0xffff ff7f80924000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffff ff7f808c2000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3)[897EB322-FD55-36D7-A68E-9E9C34A74A84]@0xf fffff7f808ec000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
11B26
Kernel version:
Darwin Kernel Version 11.1.0: Tue Jul 26 16:07:11 PDT 2011; root:xnu-1699.22.81~1/RELEASE_X86_64
Kernel UUID: D52AAB80-B2BC-3C6E-BBEA-78BD28064998
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 257231917242
last loaded kext at 68141223033: com.symantec.kext.SymAPComm          11.1.2f17 (addr 0xffffff7f821c5000, size 16384)
loaded kexts:
com.symantec.kext.SymAPComm          11.1.2f17
com.symantec.kext.ips          3.2f8
com.symantec.kext.internetSecurity          1.3.2f5
com.apple.driver.AppleHWSensor          1.9.4d0
com.apple.driver.IOBluetoothA2DPAudioDriver          2.5f17
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AudioAUUC          1.59
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.driver.AppleHDA          2.1.1f12
com.apple.driver.AppleUpstreamUserClient          3.5.9
com.apple.driver.AppleMCCSControl          1.0.24
com.apple.driver.AppleMikeyDriver          2.1.1f12
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AGPM          100.12.40
com.apple.driver.AppleIntelHDGraphics          7.0.4
com.apple.driver.AppleIntelHDGraphicsFB          7.0.4
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.2.0
com.apple.driver.AppleSMCLMU          2.0.1d2
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0b2
com.apple.GeForce          7.0.4
com.apple.driver.AppleMuxControl          3.0.8
com.apple.driver.AppleLPC          1.5.1
com.apple.driver.AppleBacklight          170.1.9
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleUSBTCButtons          220.8
com.apple.driver.AppleUSBTCKeyEventDriver          220.8
com.apple.driver.AppleUSBTCKeyboard          220.8
com.apple.driver.AppleIRController          309
com.apple.driver.AppleUSBCardReader          3.0.0
com.apple.iokit.SCSITaskUserClient          3.0.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          32
com.apple.iokit.IOAHCIBlockStorage          2.0.0
com.apple.driver.AppleUSBHub          4.4.0
com.apple.driver.AppleFWOHCI          4.8.6
com.apple.iokit.AppleBCM5701Ethernet          3.0.6b9
com.apple.driver.AppleEFINVRAM          1.5.0
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AirPort.Brcm4331          511.20.10
com.apple.driver.AppleAHCIPort          2.1.8
com.apple.driver.AppleUSBEHCI          4.4.0
com.apple.driver.AppleUSBUHCI          4.4.0
com.apple.driver.AppleACPIButtons          1.4
com.apple.driver.AppleRTC          1.4
com.apple.driver.AppleHPET          1.6
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.4
com.apple.driver.AppleAPIC          1.5
com.apple.driver.AppleIntelCPUPowerManagementClient          166.0.0
com.apple.nke.applicationfirewall          3.0.30
com.apple.security.quarantine          1
com.apple.driver.AppleIntelCPUPowerManagement          166.0.0
com.apple.iokit.IOBluetoothSerialManager          2.5f17
com.apple.iokit.IOSerialFamily          10.0.5
com.apple.driver.AppleHDAHardwareConfigDriver          2.1.1f12
com.apple.iokit.IOSurface          80.0
com.apple.iokit.IOAVBFamily          1.0.0d22
com.apple.driver.DspFuncLib          2.1.1f12
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOAudioFamily          1.8.3fc11
com.apple.kext.OSvKernDSPLib          1.3
com.apple.iokit.IOFireWireIP          2.2.3
com.apple.driver.AppleHDAController          2.1.1f12
com.apple.iokit.IOHDAFamily          2.1.1f12
com.apple.driver.AppleSMC          3.1.1d2
com.apple.driver.IOPlatformPluginFamily          4.7.0b2
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleGraphicsControl          3.0.8
com.apple.driver.AppleBacklightExpert          1.0.3
com.apple.nvidia.nv50hal          7.0.4
com.apple.NVDAResman          7.0.4
com.apple.iokit.IONDRVSupport          2.3
com.apple.iokit.IOGraphicsFamily          2.3
com.apple.kext.triggers          1.0
com.apple.driver.BroadcomUSBBluetoothHCIController          2.5f17
com.apple.driver.AppleUSBBluetoothHCIController          2.5f17
com.apple.iokit.IOBluetoothFamily          2.5f17
com.apple.driver.AppleFileSystemDriver          13
com.apple.driver.AppleUSBMultitouch          220.23
com.apple.iokit.IOUSBHIDDriver          4.4.0
com.apple.iokit.IOSCSIBlockCommandsDevice          3.0.0
com.apple.iokit.IOUSBMassStorageClass          3.0.0
com.apple.driver.AppleUSBMergeNub          4.4.0
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.0.0
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.7
com.apple.driver.XsanFilter          403
com.apple.iokit.IOAHCISerialATAPI          2.0.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.0.0
com.apple.iokit.IOUSBUserClient          4.4.0
com.apple.iokit.IOFireWireFamily          4.4.3
com.apple.iokit.IOEthernetAVBController          1.0.0d5
com.apple.iokit.IO80211Family          400.40
com.apple.iokit.IONetworkingFamily          2.0
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IOUSBFamily          4.4.0
com.apple.driver.AppleEFIRuntime          1.5.0
com.apple.iokit.IOHIDFamily          1.7.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          165
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          326
com.apple.iokit.IOStorageFamily          1.7
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.4
com.apple.iokit.IOPCIFamily          2.6.5
com.apple.iokit.IOACPIFamily          1.4

No I didn't do anything like that, but...
I've found a pattern/cause!
It's every time I open the app store. Why on earth would that be?

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.

HT1349 When I start my I Mac desktop the fan keeps running loudly. Can't get it to turn off.

When I start my I Mac desktop the fan keeps running loudly. How do I get it to stop?

Hello there, Jacquefromaz.
The following Knowledge Base article reviews the steps to perform a reset of the System Management Controller (SMC):
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Mac mini fan keeps running!

Today I turn on my mac mini (late 2011) and its fan keeps running... How can I solve it?

Try resetting the SMC
Intel-based Macs: Resetting the System Management Controller (SMC)

Powerbook fan keeps running

Hi,
My Tibook's fan keeps running - battery life is at 40 minutes because of this. I am running OSX 10.4.8. I tried quitting all apps but no use.
Any ideas?
Tnx
Guy

Hit the power button while unplugged at least at one time use to be part of SMC Reset procedure - it gets rewritten every year or so it seems.
Or you could say there was/is a different procedure for each model year.
Some found the culprit was their 3rdd party RAM.

T410 - 252226G slow start, fan keeps running, BIOS config hangs

Windows 7 Prof FP1, 80 GB SSD. 4GB Ram
Some strange unusuall behaviour:
1. It takes up to 45 seconds before the ThinkPad Screen is shown when starting (latest 1.45 bios version)
2. When T410 is closed down using W7 system power off; the fan keeps running until the battery is empty. When de/attaching the charger in this stage the T410 beeps like it's still running
3. When choosing 'config' option in BIOS the T410 hangs
Any clue?

I would do a BIOS reset. If your T410 has no supervisor password, then remove the BIOS battery, leave it out for a couple of minutes and then plug it again.
When the T410 boots, go to the BIOS, press F9 to load the default values, save and re-start.
Hope this helps...
/L40SX/240/240X/2*340CSE/360PE/365XD/380D/380E/380XD/380Z/390/560E/560X/2*570/2*600/600E/750Cs/755C/760CD/760EL/760XD/770E/A20p/A22p
A31/i1600/G40/R50p/R61i/S30/SL510/2*T22/4*T4x/11*T6x/6*T4x0x/6*T5x0/3*W5x0/W700/3*X2x/4*X3x/3*X4x/5*X6x/3*X6xT/10*X2xx/2*X200T/4*X30x/Z60m/3*Z61x
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I have an MAC OSX 10.6.7 and when I turn it on the fan keeps running. I shut down/turn on and it's the same. Any suggestions? Thanks.

I have an MAC OSX 10.6.7 and when I turn it on the fan keeps running. I shut down/turn on and it's the same. Any suggestions? Thanks.

jean156,
I am a little confused, you are posting in an iMac forum however your profile only indicates you have a MacPro. While I agree a SMC reset may help please carefully read the link The hatter provided because different Mac's have a different processes for resetting the SMC.
In the mean time you may want to update your profile (Your Stuff in upper right and click Profile) and also please post in the correct forum to avoid confusion.

What is application memory and why does my macbook pro keep running out of it?

what is application memory and why does my macbook pro keep running out of it?

There is excessive swapping of data between physical memory (that is, the memory chips on the logic board) and virtual memory (one or more files on the startup volume.) That activity is relatively slow and causes the whole system to be less responsive. It can happen for two reasons:
          A long-running process with a memory leak (a kind of bug)
          Not enough memory for your usage pattern
Please note that if the cause is a memory leak, installing more memory will not help. That's likely if you already have more than 4 GB of memory. Tracking down a memory leak can be difficult, and it may come down to a process of elimination.
These instructions are for OS X 10.9 and later. Some details may be slightly different for earlier versions of OS X.
When you notice the swap activity, open the Activity Monitor application and select All Processes from the View menu, if it's not already selected. Select the Memory tab. Click the heading of the Real Mem column in the process table twice to sort the table with the highest value at the top. If you don't see that column, select
          View ▹ Columns ▹ Real Memory
from the menu bar.
If one process (excluding "kernel_task") is using much more memory than all the others, that could be an indication of a leak. A better indication would be a process that continually grabs more and more real memory over time without ever releasing it. Here is an example of how it's done.
The processes named "Safari Web Content" render web pages for Safari. They use a lot of memory and may leak if certain Safari extensions or third-party web plugins are installed. Consider them prime suspects.
Another process often implicated in memory leaks is "inkjet4" or "inkjet8," which is a component of the HP printing software. If it's present, force-quit the process in Activity Monitor to solve the problem temporarily. Empty the print queues in the Printers & Scanners preference pane (which has a slightly different name in each recent version of OS X.) If you don't use an HP printer, reset the printing system. Otherwise, if the problem is recurrent, update the software (which may not help) or contact HP support.
"Wired" memory should be a small part of the total. That memory is not swapped, but it makes less physical memory available which may then result in swapping. If you have a lot of wired memory, that's usually an indication of a memory leak in a third-party program that modifies the operating system at a low level. Ask for guidance in that case.
If you don't have an obvious memory leak, your options are to install more memory (if possible) or to run fewer programs simultaneously.
The next suggestion is only for users familiar with the shell. For a more precise, but potentially misleading, test, run the following command:
sudo leaks -nocontext -nostacks process | grep total
where process is the name of a process you suspect of leaking memory. Almost every process will leak some memory; the question is how much, and especially how much the leak increases with time. I can’t be more specific. See the leaks(1) man page and the Apple developer documentation for details.

Fan keeps running. Maybe from RAM upgrade?

I recently installed 4G of ram into my computer as the old ram was bad. I didn't notice anything for about 1 1/2 months but all of the sudden my fan keeps running. From what my istat pro says, it ranges from 3000 rpms to over 6000rpms! As you can imagine, this is very annoying. My performance isn't affected but the fan is annoying. I have 4G of 667 MHz DDR2 SDRam. I'm worried about over heating. Could somebody please help me with my fan problem?!

Thanks, I love being able to answer questions and help people

Macbook pro retina 15 won't sleep, fan runs hard

Late 2013 Macbook Pro Retina 15" will not sleep when I close the cover. When I return to it, the fan is running full blast. This has happened every so often ever since it was new and is now happening again. All apps are closed.

Try an SMC reset. Follow the method "for a battery you should not remove yourself."
http://support.apple.com/kb/ht3964

My imac desktop 9.1 the fan keeps running..i have turned off and also pulled power plug but it still runs

the fan on my imac9.1 keeps running..i shut it down and pulled the plug..did not help

The fan minimum speeds are about 1200 rpm, so if the Mac is powered on and not sleeping, they're running.
An iMac's exhaust fans will not run if its power cord is disconnected. If that's what you meant to write, you're hearing something else.

HT201640 My Mac Becomes very hot easily and fan keeps running even without running any apps

Hi all,
My MacBook Pro Mid 2012 Retina recently get hot easily and the fan just keeps running even with low work load.
For example, right now, I just have Safari opened. (only one webpage opened, which is this) and my keeps running. the laptop gets hot.
If w/o the adapter connected, it can only last 1.5 hrs.
wehen clicked on the battery symbol on the menu bar, under the "Apps Using Significant Energy'" it says Safari.
Even sometimes, I have no apps open, the fan will still be running. and there is no apps using significant energy...........
what is wrong with my mac? I tried System Management Reset couple times, it does not help....
and all my apps/OS are updated! I dont have too many apps (only 30) installed on my mac.
Thanks for any comments/ideas.

Back up all data before proceeding.
Quit Safari if it’s running. Then select
           ▹ Force Quit…
from the menu bar. A small window will open with a list of running applications. Safari may appear in that list, even though you quit it. If so, select it and press return. Close the window.
Step 1
Hold down the option key and select
          Go ▹ Library
from the Finder menu bar. Delete the following items from the Library folder (some may not exist):
          Caches/com.apple.Safari
          Caches/com.apple.Safari.SearchHelper
          Caches/com.apple.SafariServices
          Caches/com.apple.WebKit.PluginProcess
          Caches/com.apple.WebProcess
          Caches/Metadata/Safari
          Preferences/com.apple.WebKit.PluginHost.plist
          Preferences/com.apple.WebKit.PluginProcess.plist
          Saved Application State/com.apple.Safari.savedState
Leave the Library folder open. Try Safari again. If the problem is solved, stop here. Close the Library folder. If you still have a problem, continue.
Step 2
Move the following items from the open Library folder to the Desktop (again, some may not exist):
          Cookies/Cookies.binarycookies
          Internet Plug-Ins
          Preferences/ByHost/com.apple.Safari.*.plist
          Preferences/com.apple.Safari.Extensions.plist
          Preferences/com.apple.Safari.LSSharedFileList.plist
          Preferences/com.apple.Safari.plist
          Preferences/com.apple.WebFoundation.plist
          PubSub/Database
          Safari
          SyncedPreferences/com.apple.Safari.plist
Here, "*" stands for a long string of letters, numbers, and dashes.
Note 1: You are not moving the Safari application. You’re moving a folder named “Safari.”
Note 2: This step will remove your Safari extensions, if any, and their settings. If you choose to reinstall them, do so one at a time, testing each time to make sure you haven’t restored the problem.
Try again. Your settings and bookmarks will be lost. The default set of bookmarks will be restored. Delete them all.
If Safari is now working normally (apart from the lost settings), look inside the “Safari” folder on the Desktop for a file named “Bookmarks.plist”. Select
          File ▹ Import Bookmarks...
from the Safari menu bar. Import from that file. Recreate the rest of your Safari settings. You can then delete the items you moved to the Desktop.
If the issue is still not resolved, quit Safari again and put all the items you moved to the Desktop back where they were, overwriting the newer ones that may have been created in their place. You don’t need to replace the files you deleted in Step 1. Stop here and post again.
If you don’t like the results of the last step, you can undo it completely by quitting Safari and restoring the items you moved or deleted in that step from your backup, overwriting any that were created in their place.

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