MacBook :: Overheating / Shutting Down - Force Fans To Spin?
Sep 7, 2010
Over the past few weeks my blackbook has been shutting down more and more frequently from what I can only believe is overheating. I just checked my computer upon startup with SMC fan control - it starts up at about 70 C and at about 3500 RPM. Yet, after a few minutes, the fan immediately drops down to 1100 RPM or and fluctuates between 800-1400. I try to force the fans to spin with SMC Fan control, but nothing happens. I've looked all over the web and I can't find anything definitive. I know that macbooks tend to overheat. What can I do? I'm at college and I really need to find a fix for this as soon as possible.
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Mar 30, 2012
I have brought a new iMac 27'' the i5 model. I have noticed that the fans never change speed no matter how hot my processor gets ? Is this normal ? I have ran prime 95 and istat pro to check the temps and fan speeds. Nothing changes apart from the temperature.
Info:
iMac, Mac OS X (10.7.3)
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Jul 5, 2012
My Macbook's been overheating and shutting itself down the past two days, usually when on YouTube. Having installed the Fan Control system preference, I can see the fans aren't running at all. My first thought is that they might be broken, but this happened for a little while last year, too, and the fans started working again after a while. Also, it's been miserably hot in my area the past week, and I wonder if that's contributed to it, too (even though the laptop's in an air-conditioned room). Anyway, should I wait and see if the fans begin working again, take it to a repair shop (warranty's expired, so I'm not keen on that), or maybe buy a cooler pad?
Info:
MacBook, Mac OS X (10.5.8)
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Jun 17, 2012
I noticed that on my macbook pro retina, i never heard the fans spin up.Â
I tried Prime95 to stress the CPU, temperature went up to 98°c and the fans stayed at about 2000rpm... I immediately stopped to avoid damages.  Â
Info:
MacBook Pro with Retina display, Mac OS X (10.7.3)
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Dec 2, 2010
I was noticing a lot of slow-down while playing computer games on my MBP. My computer far exceeds the minimum requirements for everything, so I reckoned it must have been something other than a slow processor (2.53 GHz Core 2 Duo), low ram (4 GB) or a completely inadequate graphics card (Nvidia 9400M). The games range from 'Day of Defeat: Source' to the 8 year-old 'Return to Castle Wolfenstein'. After a bit of research, I came to realise that my exhaust fan is never speeding up past 2005 RPM no matter WHAT the load on the CPU is. To test this, I downloaded smcFanControl and ran CPUTest. As the CPU went from 50*C to 95*C, there was hardly any change in the fan's speed. The variation went between 1995 and 2005 RPM.
In order to keep the computer relatively cool when playing games or doing anything that is CPU-heavy, I have to manually increase the fan's RPM in smcFanControl. I find that setting the fans to the maximum, 6000 RPM, keeps the computer cool enough to process these games. This program works wonders and I've not had any slow-down in games as a result. However, I am worried that there might be something wrong with my Mac. Why does it not automatically increase fan speed when reaching higher temperatures? I've even reset my SMC (SHIFT-CONTROL-OPTION-Power) on start-up just to be sure I've tried everything. Any suggestions as to why my fan seems stuck at 2000 RPM?
MBP, 13-inch, 4GB RAM, 2.53 GHz
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Aug 17, 2009
I got a new macbook black that is not covered under warranty, the magsafe fried on it and it used to boot up but not charge the battery or show any signs of power from the magsafe so then I bought a new magsafe that connects to the logic board and replaced it and when I plugged the power adapter in it tried to turn on right away and then the fan spinned and the sleep light light up then it shut off right away and I didn't smell nothing from the macbook or logic board. The battery now charges and the light on the magsafe adapter lights up so I tried to turn it back on and it doesn't the same thing turns on and then right off just the fan spins and then the hdds spin lasts for like a sec or two. I tried to turn it on with the battery out and with just the battery in nothing swapped the RAM same thing went from two 1 gig sticks to 2 256mb sticks and then tried another two 2gig sticks same thing then I tried a different hdd and have the same thing happen? What I need to do to get this working and yes I tried a google search and every1 ended up taking it to apple and I cannot do that.
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Apr 10, 2009
i have a 2.4 ghz alum macbook and i was wondering at what temperatures does your fans start to actually spin up. i'm at 70C right now and it still hovers at +/- 2000 rpm just wondering if this is normal i used smc fan controller for a little bit but i decided that i would just leave it to apples default and use a laptop cooler if i really need the extra disccipation.
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Sep 7, 2010
over the past few weeks my blackbook has been shutting down more and more frequently from what I can only believe is overheating. I just checked my computer upon startup with SMC fan control - it starts up at about 70 C and at about 3500 RPM. Yet, after a few minutes, the fan immediately drops down to 1100 RPM or and fluctuates between 800-1400. I try to force the fans to spin with SMC Fan control, but nothing happens. I've looked all over the web and I can't find anything definitive. I know that macbooks tend to overheat. What can I do?
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Jul 28, 2008
I'v just noticed, after installing iStat menus, two different CPU usage measurement graphs. Core 2 duo, so apparently one for each core or chipset, whatever . But the weird thing is, that sometimes, while watching movies, burning dvd etc. (sample "high usage" situation), when the CPU temp. goes around 60 celc. and fan spins at 6200 rpm, one of the "core graphs" shows nothing, like the core is shutting down (screen attached). It's annoying, because the whole system slows down, I can't do anything, and after like 5 mins it gets back to normal (after closing for example the movie). Any solution for this or should I just get used to it?
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Apr 24, 2009
i can't watch videos online like the daily show with john stewart. the fans start going full blast-- up to 6000 rpm-- my main CPU goes up to 120 degrees. then the computer shuts down. any idea why it does this? happens when i work in photoshop sometimes too.
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Feb 11, 2010
My Macbook is 1.5 years old (13in, white, 2 GHz). About two weeks ago, it would randomly shut off. It would restart fine, but shut off sooner. Sometimes, it wouldn't even restart. Now, it's at the point where when I power it on, it rarely restarts past the white apple start-up screen.
My thought is that it is overheating. Are there any more ideas? What can I do to save my macbook?
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Sep 10, 2009
I have a G5 that is about 5 years old. For some reason it will not sleep or shutdown. When I try to do either one of those actions it does simi-sleep/shut down, but not completely. By that I mean it sounds like the hard drive spins down but then fans still are running. After about two minutes the fans spin way up and the Mac won't start back up. I have to pull the power on my battery backup. I took it to the shop (Not an apple store) and they reinstalled the OS for me and put some new ram in. Supposedly they "Fixed' the problem.
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Jan 1, 2011
Sometimes when I put the display to sleep, my imac's fans will spin really fast until I restart the computer.
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Nov 27, 2010
I've got an early 2005 model Power Mac G5. Bought it from a hospital and it's really clean inside. Lately it's been shutting down spontaneously without warning. I thought it might be an issue with overheating, but I'm not that familiar with normal heat levels for a CPU. I installed iStat nano and checked the temperatures. I took a screen shot of the widget. Temperatures are in Fahrenheit. Can anyone tell me if I'm on the right track? What do I need to do to solve this problem?
Power Mac G5 (early 2005)
PowerPC G5
Dual 2.3GHz
2 GB DDR SDRAM
Model Number:A1047
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Dec 31, 2010
I don't know if it is a fan or a drive that starts up and runs really fast and loud, then the computer shuts off. I always thought it was the fan, but now am not sure. I have moved it to a place where it is exposed to more air, but that has not seemed to help. Does anyone have an idea or solution to this problem? The nearest Mac dealer is about 80 miles away, so if I can fix this on my own, I would like to try.
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Jan 14, 2010
I've googled to see if I can find a solution to this but not had any luck - wonder if you could help. My Mac Mini is 1.5Ghz PowerPc G4, 512Mb RAM, running Mac OS X Version 10.5.8. I bought it second hand a couple of years ago and in the past while it's really been playing up a bit. It first started overheating and shutting down when I was doing really resource intensive stuff - for example, opening a large amount of RAW image files. However, it's now started taking to shutting down when I'm doing normal browsing, using Spotify etc The machine also tends to hang a lot, and I can't really stream videos very well either. The vents at the back of the Mac definitely aren't blocked and there's plenty of space around the machine to let the air circulate.
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Jun 12, 2012
How do I turn on the fans on my iMac to keep it from overheating? I used to be able to turn them on when I plugged in the computer and turned the computer on simultaneously but that stopped working.
Info:
iMac (20-inch Late 2006), Mac OS X (10.6.4)
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Nov 6, 2007
I have a G5 dual 2gig and in idle mode it seems to a be slightly overheating as my fans start to blow harder and I get my mouse sticking I am running the latest version of Tiger with 3.5gigs of ram I did post in the IDvD, Logic Pro, and the Final cut pro forums the impact of an upgrade of 8gig of ram on my system whether my apps would run better and the system as a whole.
But I have not been able to get any feed back on this that was clear and I was asked to try here on this forum so here I am. I deeply love my G5 and what it can do I am just wondering if it is working at its most optimum I do regularly do my house keeping i.e. repairing permission and occasionally using Tech tool Pro to look over the system but nothing out of the ordinary jumps out. I have a screen shot of my activity monitor and cpu monitor but I do not know how to attach it.
Information:
G5 Dual 2 GiG
Mac OS X (10.4.9)
3.5gig of Ram 1530 Gigs of HD storrage/RME Hammerfall Multiface /Canopus 100
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May 14, 2009
Having these main problems (which I'm sure many have witnessed using Leopard):
(I have a desktop imac (intel core duo 2.66).)
1 The machine often refuses to shut down (or restart) and I get that black veil slide down the screen following the "you need to restart your computer..." message
2. The machine refuses to shut down and just stays on the desktop image with the black spinning wheel spinning endlessly.
3. I'm getting problems with applications refusing to quit (even when using opt-cmd-escape) . even when the computer "acknowledges" that the ap has quit, the icon is still active in the dock underneath.
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Apr 26, 2012
I can't quit, or force quit in finder. Beach-ball continues to spin and spin
Info:
iMac, Mac OS X (10.6.2)
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Oct 1, 2009
I have a new macbook, see stats below.
Up till last week everything was fine, I could run 'Second Life', photoshop, email, a browser, download stuff, play Itunes AND watch a movie all at once without any trouble.
But recently the computer has gone a bit weird.
It started getting very hot, much slower and turning itself off.
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Jul 27, 2009
the other day i wake up and open my macbook pro and immediately heard the fan making noises ive never heard it make before. i checked istat pro. the fans were going at 2000rpm. this is when i started to get concerned since i would never hear the fans at that speed before. the difference was day and night. it sounds like the one or both of the fans are hitting something. i always hear the noise when i start up or wake up from sleep and after a while (30 minutes to an hour) it usually goes away but has come back once without me turning off or putting the computer to sleep. its a refurbished less than a little more than a month ago. im hoping its just some dirt that made it through keyboard and will eventually go away because i dont want to send my machine in to get manhandled by apple repair. has anyone had something like this happen before?
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Mar 23, 2010
I have a MacBook which has recently been shutting down when it feels like :/ this all started a week or two ago (well not the shut downs but other issues that I'll get too), basically the fan I think has been knocked as it is bumping the top or something as the whirring is getting loud and it sounds like every now and again it hits something
Also CPU usage seems to be averaging out at 20% for Safari and 100% for HD Video where as it used to be very small amount for Safari and 30 - 40% for HD.
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Sep 14, 2010
When I go to turn on my MacBook pro nothing happens. No sound no hd spin no nothing. Last put computer to sleep and had it plugged in charging. Now when plugged in led doesn't turn green or any color just stays off and battery detector on side of laptop does nothing at all.
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Jun 11, 2010
I've recently uninstalled Fan Control and smcFanControl from my Macbook Pro, after trying them for a minute or two. I reset my SMC by using the method on Apples website (Clicking Shift-CTRL-Option-Power Button at the same time). It haven't worked it seem, as I have tried running some games and even at 85-90C degree, its not increasing its RPM. I don't wanna go any higher as I don't wanna risk the CPU overheating.
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Mar 28, 2012
My 11 month old macbook pro (2011) was recently sent under warrenty for Harddisk SPIN RETRY COUNT value increase. They changed the harddisk and installed new Toshiba harddisk. Which ran 100% S.M.A.R.T health for two weeks and now it is showing same Spin retry count problem. I am thinking its not the harddisk but something else is causing the problem( may be power supply problem). I am from nepal so it takes a lot of effort to send it in for repair.
Info:
MacBookPro, Mac OS X (10.6.8)
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Jun 4, 2014
Why do I get the spinning wheel while I'm typing? It holds me up for 3 seconds at least each time.Â
Info:
MacBook Air (13-inch Mid 2013), OS X Server
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Apr 26, 2008
Basically, after the fans rev up to 6200rpm, the rpm stays there and never comes down, even after the computer is sitting idle for awhile. I installed the smc update and am using coolbook to try to avoid core shutdowns. Is anyone else having this problem? I'm going to try replacing the thermal glue tomorrow, to see if that helps, but it seems somehow unrelated to me. I'm using smcfancontrol to monitor the rpm of fans.
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Jul 10, 2009
I have had my macbook pro just over a year with no problems. Now I am trying to burn a folder with work in it (indesign, etc) but when I put a blank cd or dvd-r in, it is not recognized. It doesn't spin, no noise, etc. I have tried clicking on the folder and choosing the "burn this folder" option, but the result is the same. Music and data CD's are recognized. I already have an appt. with the genius bar, but I'd really like to avoid the hassle if possible. I just did all firmware updates and software updates.
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Jun 7, 2010
Last night, after a few hours of using it (from 100% to about 8%), I tried turning off the computer for the night. After the dock and everything else disappeared, I got a spinning beach ball of death. The computer wouldn't turn off for at least 15 minutes. I had to do press the power button for 5 seconds to get it to turn off. I restarted it this morning and it seems to be working fine for now, but I'm scared of turning it off again.
Here's what I know: while the beach ball was happening, my wallpaper was still on the screen, the trackpad worked, but the brightness and volumes didn't, so I'm guessing I was logged out and no files were corrupted.
During the beach ball, the hard drive would slow down, then spin back up. I waited until it had slowed down a bit to do the hard reboot. I have to say that I reset the PRAM yesterday morning, thinking it might be good because I changed the hard drive to the Momentus XT last week and I read that you should reset it when you change hardware inside the machine. I did that before the crash, so when it crashed, it was the first time I tried to turn the machine off since resetting the PRAM, could that matter?
This morning, I went to disk utility and repaired permissions, there were probably a few hundred bad permissions, but Mac OS fixed them. I also tried verification, but it was alright. I then ran the daily, weekly and monthly tasks and everything went great.
What should I do? I already have a charger problem and a �screen is too blue whichever way I set it� problem. Do I have a lemon here?
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