Why are the fans on my macbook constantly running loudly

The fans on my macbook are running loudly and my computer is running very slowly.
Does anyone know a solution to this?

Either the cpu is cycling doing some intensive work (see Activity Monitor) or the SMC needs resetting.
http://support.apple.com/kb/ht3964
You can also install an app to monitor temperature and speed eg SMC Fan Control.

Similar Messages

  • Why is the fan on my MacBook Pro so loud?

    For the past week, my macbook has been really loud. About 2 weeks ago, I noticed it would start getting loud when I ran high-energy programs, or when I was downloading large files or streaming movies. It would start getting loud, would stay loud for a little while, and would then die down. This week, specifically today and yesterday, my laptop has been loud constantly, even when I'm only running 2 tabs on google chrome. My laptop doesn't feel like its getting too hot or over heating. How can I fix this?
    Hardware Overview:
      Model Name:          MacBook Pro
      Model Identifier:          MacBookPro8,1
      Processor Name:          Intel Core i5
      Processor Speed:          2.4 GHz
      Number of Processors:          1
      Total Number of Cores:          2
      L2 Cache (per Core):          256 KB
      L3 Cache:          3 MB
      Memory:          4 GB
      Boot ROM Version:          MBP81.0047.B27
      SMC Version (system):          1.68f99
    Any help is appreciated.

    Try:
    Reboot into Safe Mode then reboot normally. Safe mode takes longer to boot than booting regularly. That is normal.
    Intel-based Macs: Resetting the System Management Controller (SMC)
    Resetting your Mac's PRAM and NVRAM
    Open Activity Monitor in the Utilities folder.  Select All Processes from the Processes dropdown menu.  Click twice on the CPU% column header to display in descending order.  If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar.  Click on the Force Quit button to kill the process.  See if that helps.  Be sure to note the name of the runaway process so you can track down the cause of the problem.

  • Why would the fan on my macbook be constantly runs, even when no applications are running.  Why?

    Why would the fan on my MacBook constantly run?  Even when I have no applications running?  Is there a way to determine what is causing this to happen?

    JAWade, try resetting the SMC and pram. Not always, but often those resets help problems like yours. Follow these instructions exactly.
    To 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.
    Resetting PRAM and NVRAM
    Shut down the computer.
    Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
    Turn on the computer.
    Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
    Hold the keys down until the computer restarts and you hear the startup sound for the second time.
    Release the keys.

  • Invites to my calendar do not appear in my calendar on macbook pro running  Maverick, but appear on my other icloud syn ios 7 ipad and iphone. Why wont the invites show on Macbook Pro running Maverick?

    Invites to my calendar do not appear in my calendar on macbook pro running  Maverick, but appear on my other icloud synch ios 7 ipad and iphone.
    Why wont the invites show on Macbook Pro running Maverick?
    All other calendar events sync fine through Icloud.

    Hi Fundads,
    If you are having issues receiving calendar updates on your Mac, you may find the following article helpful:
    iCloud: Troubleshooting iCloud Calendar
    http://support.apple.com/kb/ts3999
    Regards,
    - Brenden

  • The fan on my MacBook is running a lot

    The fan on my MacBook is running a lot. What could this mean. The unit is on a flat cool surface.

    running demanding applications, or watching movies etc will cause that and it is normal to stop your mac from overheating.

  • Why do the fans on my macbook pro suddenly rev up

    The fans on my macbook pro (about 3 - 4) yrs old suddenly rev up and the computer gets very hot. This is sometimes (but not necessarily) at times of optimum use.
    The case seems to be vented ok. I am running Mavericks osx and use computer for range of uses - graphics, e-mails, word and spreadsheets.
    Is this a problem?
    it sure make the computer noisy.

    Hello kiwiwoodz,
    Thanks for the question. After reviewing your post, it sounds like the fan is running at high speed while properly ventilated. I would recommend that you read this article, it may be able to help you isolate or resolve the issue.
    Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
    Thanks for using Apple Support Communities.
    Have a nice day,
    Mario

  • Why is the fan of my Macbook Air suddenly so noisy?

    It has become very noisy. The fan is running constantly. I never heard the fan before. Has something broken. The performance has not changed but it takes much more to start up and shut down.

    Hi aschicchi,
    Welcome to the Support Communities!
    Here are a few troubleshooting steps to address your fan issue:
    Intel-based Macs: Resetting the System Management Controller (SMC)
    http://support.apple.com/kb/HT3964
    "...these symptoms may indicate that an SMC reset may be necessary:
    Fans
    The computer's fans run at high speed although the computer is not experiencing heavy usage and is properly ventilated."
    Before Resetting the SMC
    Try each of the following steps in this order before you reset the SMC.  Test the issue after completing each troubleshooting step to determine if the issue still occurs.
    Press Command + Option + Escape to force quit any application that is not responding.
    Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosingSleep. Wake the computer after it has gone to sleep.
    Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
    Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
    Resetting the System Management Controller (SMC)
    Shut down the computer.
    Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
    On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
    Release all the keys and the power button at the same time.
    Press the power button to turn on the computer. 
    Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
    I hope this information helps ....
    Have a great day!
    - Judy

  • Why are the graphics cards in macbook pro's so weak?

    Considering the price of a macbook pro, why is it they don't offer anything more than intel iris graphics or a 750m? That's the only thing holding me back from getting a macbook pro. I like to game, and those 2 just aren't enough for the kind of gaming I do.

    Apple - Feedback

  • Why are the ports on my macbook pro not working?

    I have a 2.4GHz intel core i5 Processor with 4 GB memory fully up to date lion processing system and no matter what I do I can not get my usb ports to work. They both worked a few months back, but after a while one of the 2 ports gave out still produced power but it didnt see anything in there which was fine I moved my cooling pad to that slot and used the other for my wireless mouse but just recently the last of the 2 slots gave out and now I have 2 ports that emit power but dont ever read when I put something in the slot. I have been hitting up youtube and the internet in general and have yet to find a solution.

    I suggest an appointment at an Apple store genius bar.
    Ciao.

  • Why is the fan of my MacBookAir3,2 running at 6519+ rpm?

    I am currently running two apps: Safari with Google Docs and Activity Monitor. 
    Fan stops doing this upon reboot but starts again after a while. I am obviously not provoking this by running any heavy apps or the like.
    OSX: 10.10.2 (14C1514)
    The Mac is pluggin in.
    It is fully updated
    I have already tried resetting the SMC a couple of times without any results.

    Thanks
    Helpful article, but there were no runaway apps. The only two apps running were Safari (one window Google Docs) and Activity Monitor.
    This also happens unprovoked, for instance when I am viewing PDFs in Preview.

  • Why is my Macbook Pro 2.33 so hot and why are my fans on so high?

    So, I'm sitting here with just Safari 3.1.1 open with just this single page, nothing else running on my machine, 3GB of RAM, and activity monitor reports a total 3.5% CPU usage. Why is my Macbook Pro hot like it's really working (not something-is-broken hot, just the temperature I'd expect with Photoshop, Illustrator and Flash all open at the same time) and why are the fans running like a jet engine?
    No weird errors in the console, Spotlight isn't indexing, nothing special in the Dashboard, lots of spare space on the HD, permissions repaired, disks have been checked, I turned off icon previewing on the desktop, top doesn't report anything more than Activity Monitor does -- it really seems like my machine is genuinely wheezing at 3.5%. I was just asked if I wouldn't mind working in another room because my machine is so noisy. You heard me right, my Macbook Pro is getting me kicked out of places.
    I've put up with the clump of dead pixels, airport connection issues, now-useless DVD burner that an Apple update bricked, and early battery death, but this one is just boggling. If anyone has any advice I'd be grateful.

    Welcome to Apple Discussions!
    Do you have iStatPro? You can download it from the Apple site and see what it is that is running so hot. Under the low usage you describe, the fans should be idling silently. And you might be able to tell what is getting so hot.
    If Activity Monitor doesn't show anything, then you might want to run the extended version of the Apple Hardware Test. It sounds like something is getting very hot. If there is a hardware problem, then you should get one or more error codes. The Apple Hardware Test is on Install Disc #1 of the gray discs that came with your Mac--you boot to it by holding down "D". Instructions are on the disc and on the screen.
    Also, be sure you have "All Processes" selected on the Activity Monitor. And the boxes at the bottom should be mostly black with very little red or green at 3.5% CPU usage. Given all the symptoms, I am surprised that there is not some process running amok in the background.
    Good luck!

  • I loaded a lot of music from my CDs on to my iMac at home.  All my music is stored on the cloud.  So why is the music on my MacBook Pro different.  The CDs are missing from this list.

    I loaded a lot of music from my CDs on to my iMac at home.  All my music is stored on the cloud.  So why is the music on my MacBook Pro different.  The CDs are missing from this list. The iTunes account details I use on both computers is the same.

    Hi Chris,
    Thanks for the reply.
    I think you ave sorted my problem with your question.  I thought that as my iTunes account was on their server (Cloud) and I had previously added CDs which showed up, that all my music was "on the cloud".  I used to use Match but when I turned it off lost all my music that I had previously loaded onto my computer.
    So I guess I have to use the cloud again to access my songs.  This is frustrating as I fly a lot and can not use the music (Cloud based) when the phone is in flight mode as there is no internet.
    So how then do I retrieve all my music to my iMac and have my laptop synced so they are the same?
    I am totally confused now.

  • Why does the fan run for long periods on macbook pro

    why does the fan run for long periods on macbook pro?

    to keep the internal components of you mac at a safe operating temperature.

  • The fan sound of macbook air

    Is it normal to hear the fan sound of macbook air. not all the time

    Welcome to the Apple Support Communities
    Sometimes, when you are doing heavy tasks with your computer, temperature increases. Your Mac turns on fans automatically when temperature increases a lot, so it will keep your computer safe. It's normal and you shouldn't be worried if this doesn't happen all the time

  • The fan on my macbook is loud

    Tonight the "super quiet fan" on my MacBook Air is loud!  Do I need repair??

    are you doing the same type of activity on your mac that you normally do when the fan is quiet?  If so, try an SMC reset

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