IMac running hot, what's wrong?

My iMac (24" Mid -07, 2.4G Intel C2D, 4GB RAM, OSX 10.6.8) is running real hot and it's not just the summertime.
Temperature Monitor gives me following values:
Hard drive bay: 55c
Display screen proximity: 59c
CPU A heatsink: 59c
Graphics processor chip 1: 70c
Graphics processor heatsink 1: 71c
Graphics processor temperature diode: 75c
Main logic board: 62c
Optical drive: 49c
Power supply position: 89c <------ ***??
Wireless module: 69c
Activity Monitor values:
CPU % User: 26.44
CPU % System: 5.99
CPU % Idle: 70.67
Threads: 588
Processes: 78
Memory Free: 720.6MB
Wired: 410MB
Active: 2.35GB
Inactive: 564MB
Used: 3.30GB
VM Size: 153.77 GB
Page ins: 45.08 GB
Page outs: 2.53GB
Swap used: 2.73GB
I could fry an egg on the computer if I wanted. I have had to replace my hard drive twice because of temp fails and have reinstalled OSX a few times without any help. Fans running like ****. I am running Google Chrome with three windows (21 tabs in total)
I can't say the computer is reallly "unresponsive" per se, but it is slow and not something you'd expect of a 2.4G C2D machine. If I open a Youtube tab, the videos jerk like crazy.
Any suggestions??

As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.
Here is a link to a Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/

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IMac running hot; what is it DOING?

I understand many people are concerned with how hot iMacs run. I'm not too worried since I'm sure Apple has stress-tested these computers and engineered them such that they will run for many years even if you're doing 3-D renders in Death Valley. Just because a human is uncomfortable at 150 degrees doesn't mean a computer chip will stop working.
But what I don't get is what the iMac is DOING. Sometimes I will be doing a lot of intensive stuff (I check Activity Monitor frequently) and the top of my iMac will only be lukewarm, and other times I leave it idle (doing absolutely NOTHING) for an hour and I come back and the top is HOT.
This is a complete mystery to me. Has anybody been able to figure out what causes these computers to heat up?!

Coming from an electronics engineering background, I can tell you most assuredly that the heat generated inside the current iMac design enclosure is not good for the electronic components over a period of time.
There are a lot of posts here of hard drive failure, CPU, GPU and even logic board failures.
I am convinced that all are heat related issues.
Heat is the enemy of all small electronic components, period!
Component failure and component "brown-outs" can be caused both by fluctuating electric current and/or heat!
Electronic components like to operate in as cool a temperature as possible. Conputer components, at one time were cooled by either water, anti-freeze-like fluids, liquid Nitrogen, etc.
In earlier iMac models, heat was vented by having a case with that has ample venting built-into the case design.
The new iMac designs IMO, do not have enough sufficient, passive venting to vent all of the heat the iMac components generate. I feel the aluminum body conducts as much heat on the inside of the enclosure as it convects outward from the enclosure with an insufficient net reduction in overall internal temperatures.
Apple has definitely NOT done long duration stress testing of its current designs.
It refreshes its product designs every couple of years or so. So why do long-term testing on a design that will be redesigned and refreshed every few years. I believe they do not.
Apple engineers were simply concerned much more with the complete quiet operation of the iMac design than with internal heat buildup issues within the current iMac enclosure designs.
I and many other users use a software fan control to ramp up the iMac's internal fans as well as use an external fan on the backs of our iMacs to further cool them down more directly.
The result is an additonal 15% to 20% reduction in the iMacs overall running temps.
As to your main question, when running OS X applications, OS X is doing things, while the apps you are also running are doing things. These things use CPU, GPU cycles, swapping commands and data in/out of RAM, maybe using hard drive cycles, etc. These processes work different hardware and software components of your iMac and, in turn, increase the components temperatures. Typically the CPU, GPU and hard drive ( and in the case of getting data on and off of discs, the optical drive) do heat up appreciably and heat up even more when the application tasks get more and more demanding of the Mac hardware.

IMac running hot (21.5-inch, Mid 2011)

Hi
I just wanted to give a heads up on my new intel iMac running hot when the monitor is brighter than half way or (newer) games are set to high graphics performance.
I was concerned from the back of the computer feeling very hot so I popped off the front glass and LED screen and took a couple pictures of the logic board where I assume capacitors or on the other side:
You can clearly see where the logic board is getting hot with a little scoring.
to resesolve this issue, I simpy run my games (which are newer ones btw) at lower graphics settings and keep the monitor level below half way. . .
anyway, just thought you should know.

Ok panic over
I found this http://www.derman.com/iMac-Fan-Control
I set the minimum fan speed to 2000, machine is much cooler now. I suppose so long as the fan does not wear out I'll be fine now.
You know picures like you have taken are very worring, iMac is VERY expensive and I expect quality and I don't expect to see what you have. I feel your pain bro...

HP Pavilion Elite E9120F running hot, what fan do I need to buy. It is running at over 90 degrees

My desktop HP Pavilion E9120F began to run hot, fan was coming on very slow, I cleaned really good, was a bit dusty.. I think this may have caused the problem. It is not running at 90 degrees farenheit. I replaced the video card so I could run video programs thinking that would fix it, didn't. I am wondering do I need to buy a new fan to keep the temp down or is my CPU damaged and can't be fixed? I can still run my programs but CPU gets to 100% and it never gets under 78 degrees. Help I don't know if I should just buy new fans or what?

If this is your CPU, it's range is 55°C - 71°C. Here is how to measure a fan
I am a volunteer. I am not an HP employee.
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IMac running hot? How can I check temperatures

I have a 2008 aluminum iMac that seems to be running hot. Have cleaned the air intake and vent. Running Lion. Is there an app or other method to access the temperature of the drive? Several previously popular 3rd party apps could check temps and adjust fan speeds but I can't find any that run in Lion. Any advice?

You could download the free iStat Pro widget which should give you this information (and a whole lot more):
http://istat-pro.en.softonic.com/mac

I have installed adobe flashplayer but it will not run. What is wrong?

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27" iMac running hot, loud fans, restart each day

I have a current model 27" iMac 3,4GHz Intel Core i7 with 16GB Ram, Dual Drive (250 GB SSD, 1 TB SATA) with a second Thunderbolt Display. Each day I run Safari, Mail and Chat along with itunes (Music) or Pandora, and 1 possibly one or two other programs (Photoshop etc) but nothing overly taxing. Without fail, the fans start running and within 30 - 45 minutes the computer starts running slow and freezes up. This happens once a day between 1 and 4 PM.
The temperatures are climing into the 170 range. (I would put more specifics but it is actually starting to freeze up as I type this and I dont want to start over.
Any assistance would be greatly appreciated.

UNINSTALL FLASH PLAYER AND USE CHROME!!
I've had this problem for the past 3 weeks. I've taken it into the apple store and an apple certified technician.
I've done SMC reset and all the things you will find when you research this issue, besides opening up your computer.
I noticed the CPU fan would go crazy 30-40min into using safari. I would put it to sleep, wake it up, it would stop but then start back up in 30min. When I took it into apple, the technician said that flash uses up a lot of processing power, tricking your computer into thinking it's getting hot. (don't quote me on the "tricking" part, that's just how I sum it up.) He said for web browising he uses chrome because it has a built in flash.
My computer was running fine otherwise, apple even said so. The CPU fan was just going crazy.
I uninstalled my flash player, restarted the computer, I now use chrome, and it hasn't happened since.
Not saying that this will solve everybodys problem, just saying this is what worked for me.

IMac running hot! After installing Mountain Lion OS

I installed Mountain Lion and I my iMac is running so hot. The fan is running and the whole case is hot. Hot along the whole back side. Has anyone else had this happen? I call Apple Support and scheduled an appt. today to drop off for evaluation and repairs. Just be aware!

I am curious what you mean when you say that "once this process is complete, things should settle back down to normal levels" with respect to reindexing and "NORMAL" temperature levels.
Would you kindly tell me what "NORMAL" temp levels are supposed to be for an iMac Mid 2011 Intel Core i5 2.5 GHz processor with 8 GB RAM or any iMac with which you are familiar?
Here is what my stuff looks like at present. What is 'normal" operating temp?
Thanks.

IMac running hot

Our IMac is running very hot and the fans are running loudly and constantly. To fit it into a smaller space I took the stand off it. Where are the vents on these machines and what can I do to improve airflow without the stand attached?

The air intakes are located across the bottom of the iMac. If you are blocking the intakes by setting the iMac down off the stand, then you are just moments away from a total meld down.
The iMac's do not do well in tight spaces, you would do better putting the stand back on and finding a more open space or getting a new desk.

IMac runs hot after Mavericks upgrade

after upgrading from Mountain Lion to Mavericks the machine (mid 2010 IMac 27 inch) runs much hotter than before. I was hoping the power management would rather be better than worse. The upper part of the enclosure get too hot to touch comfortably without excessive load e.g. just some office programs and safari running. This even now in winter time when room temps are only about 20 deg C = 70 deg F. The fans are running higher than before.
As no topics like this are found, a general compatibility issue could most likely be excluded.
What should be checked?

Do 2-3 SMC Resets, or it also may simply be re-indexing Spotlight. Check Spotlight to determine if that is the issue by hitting Command + Spacebar and see if it's reindexing.

My new iMac are slow, what is wrong?

Hi, I just got a new iMac 21.5 tum for christmas. My parents got a MacBook Pro and it feels like their Macbook Pro are faster than my iMac. My iMac takes forever to load and start some programs and sometimes and when I play Minecraft for example and I got skype running in the background I usually have 58-62 fps and when Skype says ''Fred came online'' (or any skype notification) I get framedrops and I get around 19 fps for a few seconds. And my games and programs crash often, like when I tried to upload a video I made with iMovie to youtube, iMove crashed. And when I started the game World of Warcraft in fullscreen the screen got black for 50 seconds and then the game started. And when I try to record a gameplay with QuickTime Player its lagging alot, my friend got a iMac 21.5 tum too and he not none of theese problems and its not lagging for him when he's recording with QuickTime Player. Is it something wrong with my computer or is it just a teribly bad computer for gaming and is it like this for everyone?
Some info:
Processor: 2,7 GHz Intel Core i5
Memory: 4 GB 1333 MHz DDR3
Graphics: AMD Radeon HD 6770M 512 MB
Software: Mac OS X 10.7.2 Lion (11C74)
Sorry for my bad english! :/

Since it's new you should call AppleCare and let them walk you through troubleshooting. BTW, what is "tum?"

Back of my iMac running hot!!

My iMac is running pretty hot around the vent at the top. Is this normal? Or should it be cleaned out? ( if possible )
Any thoughts?
Ideas?
I don't run a lot of the apps most of the time.
Usually Mail safari, ichat, and skype.

TC400 wrote:
My iMac is running pretty hot around the vent at the top.
This can be quite normal. Currently the CPU on my IMac is running at 72 degrees Celsius and the secondary heat sink (which is close to the GPU) is at 85 degrees Celsius. The left top, but in particular the right top, are
very hot.
I recommend you to install some software to measure the temperatures. Lots of options here but I can recommend iStat Menus 3: http://bjango.com/mac/istatmenus. It will be the best $16 you ever invested as it shows a lot of details on your Mac and allows you to control the speed of the internal fans as well.
Eric

G5 iMac Running hot - fans reving - eventual Kernel Panic

So, I've inherited a sick G5 iMac from a friend.
She told me the fans always revved, and that it eventually "Crashed with a black screen"
She was running Panther 10.3.9 - So, I wiped the HD, installed Tiger, Updated to 10.3.9, Reset the SMU, took the back panel off, and blew out all the dust with a can of air.
The machine boots silent, CPU runs at about 125 Degrees F at the 5 minute mark.
Letting run idle... Within 10 minutes, this machine ramps the fans up, about "Half speed" and the CPU sits at about 150 Degrees F
Running any programs, and using the processor, the Fans "Rev Up" pretty much "Full bore" and the CPU runs at about 175 degrees F.
Using this machine for about a half an hour, with processor intensive tasks, will result in a Kernel Panic, and I'll be forced to re-Start the machine.
This machine qualifies for the "Power Supply / Video Extended repair service up to 3 years after purchase date"
The serial number falls within the listed serials, and it was purchased 2 and 1/2 years ago...
Only problem.... Power Supply is "Cool to the touch", no bulging capacitors, no video problems, All of the heat is originating from the processor, that "G5 Heat Sink" is almost "Un touchable"
It seems as Apple won't honor this extended repair program, on models listed, unless they "Won't start" or "have distorted, fuzzy, or no video"
So.... I have any options OTHER then to strap a bunch of 3rd party fans to this iMac like a ton of others have done?
Can I "Re-grease" the processor HeatSink ? any thoughts out there ?
running this CPU @ 175 Degrees F is eventually just going to burn this thing out, isn't it ??

Running at 175∘ is not a good thing. I'm not sure you would want to try this but this article on how to regrease the heatsink would probably help more, here's the link to get the grease,let me know what you tried...
Miriam

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We use CruiseControl to run a build for our application on Sun server every morning. Since last Saturday morning, the build has been running on the server. It normally takes 30mins in total to run the build. The last line of log message I got is "Starting the wlwBuild..."
We didn't make any changes on the build file. It just happened all in a sudden. I have manually run an ant build on the server, however, I encounter the same problem.
I suspect it is something to do with the wlwBuild. Could anyone give us some idea how this happened and what can we do to solve the issue?
We are close to a deadline for a test release. The problem become very critical for us. Any input is highly appreciated!!
Thanks,
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The wlwBuild process is hung each time we ran it. We suspect the issue is caused by the library collapsed.
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Any input is appreciated!!!
Please help!

My macbook pro keeps running hot, what can i do?

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Go to the Bresink website, download, install and then post an image of Temperature Monitor like this:
This is the link:
http://http://www.bresink.com/osx/TemperatureMonitor.html
Also post an image of Activity Monitor showing 'All Processes' and '%CPU' displaying values from high to low, such as this:
With this information we may be able to determine if you have a problem.
Ciao.

IMac running hot, what's wrong?

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