Heat and the fans not kicking in to chill things.

So today i just hecked iStat Pro and noticet the temps and fans were not kicking in to cool thing down i made a screenshot here it is. To be honest its hot outside so that is why my Ambient is that high, i was sinking my ipod and waching some YouTube that is all.
Opinions and Answers are verry much appreciated.

Just run smcFan conservatively. I've never had any problems with it on this late 2009 21.5.
Here are my settings. During the winter, I run at the defaults or just above. Right now, it's 97F outside. I'm often running on my second lowest setting, Minimum. The fan at the back helps a lot.

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HT1338 Problem: My Mac Pro is heating and the fan produce a lot of noise, what shall I do? I got the new Montain Lion

Dear best Users,
What shall I do? My Mac Pro 2.53 GHz Intel Core 2 Duo/OS X 10.8 13-inch 2009= Is heating and producing a lot of noise with the internal Fan.
Best,
Dario van der Lündin

If you can, open Activity Monitor and see what's using up all the %CPU.
If its kernel_task, shutdown immediately and do a PRAM reset, like this:
1. Power down the machine.
2. Locate the following keys on your keyboard in preparation for Step 4:
‘command’ – ‘option’ – ‘P’ – ‘R’
3. Press the ‘power on’ button.
4. Immediately – and before the grey screen appears – hold down ‘command-option-P-R’ all together.
5. Keep them held down until you’ve heard the start-up chime twice. After you release them you should hear it again, and hopefully your Mac will boot up as it should and with the kernel_task process back to normal.
If that's not it, try quitting whatever the process is by selecting it in the Activity monitor window, then 'Quit' in the task bar. If the process refuses to quit, post back with the name of the process.

Since Mavericks was installed I amd having trouble streaming and the fan kicks in and stays on when I am watching stream in features

Since I installed Mavericks I am having trouble streaming and the fan turns on and stays on shortly into watching a film on line.
Also the screen breaks up into lines and colors with no image in the middle of viewing a film sometimes several tomes.

Hi Mudra,
Thanks for visiting Apple Support Communities.
If your fan is running and you're noticing video issues when streaming video, I'd suggest first trying to reset your system, as described in this article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Reset the system
You can reset the Mac's parameter RAM and SMC.
All the best,
Jeremy

MacBook Air is laggy and the fan is out of control

My MacBook Air 2013 is laggy and the fan is out of control. The fan is out of control even when I start my macbook up. I don't know if it has something to do with Yosemite or something else. I have tried SMC restarting, and nothing has changed. I would really love to hear if anyone else is having this problem, and I would love to hear if any of you have any tips. Also I checked if anything is using up my CPU a bunch, and nothing is out of the ordinary.

The kernel is using excessive processor cycles. Below are some possible causes for the condition.
Throttling
When it gets high temperature readings from the hardware, or low voltage readings from the battery of a MacBook, the kernel may try to compensate by interrupting the processor(s) to slow them down and reduce power consumption. This condition can be due to:
☞ a buildup of dust on the logic board
☞ high ambient temperature
☞ a worn-out or faulty battery in a portable
☞ the malfunction of a cooling fan, a temperature sensor, a voltage sensor, or some other internal component
Note that if the problem is caused by a sensor, there may be no actual overheating or undervoltage.
If the computer is portable, test with and without the AC adapter connected. If kernel_task hogs the processor only on AC power, charging is causing the machine to heat up. That behavior may be normal for some models. CPU usage should drop when charging is complete.
Apple Diagnostics or the Apple Hardware Test, though not very reliable, is sometimes able to detect a fault. For more thorough hardware testing, make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
If nothing is wrong with the hardware, then whatever you can do to improve cooling may help.
Installed software
User-installed software that includes a device driver or other kernel code may thrash the kernel. That category includes virtualization software, such as Parallels and VMware, as well as most commercial "anti-virus" products. Some system-monitoring applications, such as "iStat," can also contribute to the problem. You can test for this possibility by completely disabling or removing the software according to the developer's instructions, or starting in safe mode. Note, however, that disabling a system modification without removing it or testing in safe mode may not be as easy as you think.
Corrupt NVRAM or SMC data
Sometimes the problem is cleared up by resetting the NVRAM or the SMC.
External display
Connecting an external LCD display to some MacBook Pro models while the lid is open may cause this issue. If applicable, test by closing the lid or disconnecting the display. You might get better results with a newer LED display.

Safari causing heat and excessive fan use, had to switch to Chrome

Lately, every time I open Safari the computer heats up and the fan blows continuously. This doesn't happen for Chrome, so I've had to use Chrome exclusively lately.
In Activity Monitor, Safari Networking has an energy impact of 100 and Average Energy Impact of 77, which Safari has an Average Energy Impact of 162. Chrome is at 11.
Any help would be greatly appreciated!

Usually due to Safari extensions and or plug ins.
From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.
If that helped, turn one extension on then quit and relaunch Safari to test until you find the incompatible extension then click uninstall.
If it's not an extensions issue, try troubleshooting third party plug-ins.
Back to Safari > Preferences. This time select the Security tab. Deselect: Allow plug-ins. Quit and relaunch Safari to test.
If that made a difference, instructions for troubleshooting plugins here.

I just had the seagate hard drive replaced and the fan is running loud

I just had the seagate hard drive replaced and the fan is running loud

Is your iMac a late 2009 or newer model? Did Apple do the replacement or someone else? There is a documented issue where Apple changed the hard drive heat sensor from outside the drive to inside. If you install a replacement hard drive in a late 2009 or newer iMac that's not an Apple-sourced drive, two things happen ... the fan runs like crazy and the Apple hardware test doesn't work properly.
You can read these OWCS blogs here and here on it.

Is it normal for the mac book air to run hot and the fan to be loud

I just bought my daughter a mac book air a couple of months ago and it is now running hot within two minutes of turning on and not doing anything. then the fan is loud running hard to cool it down. it does not stop. left it alone for 20 minutes. still hot and the fan is loud

It's not normal. Read Runaway applications can shorten battery runtime, affect performance, and increase heat and fan activity
Power or other problems related to unexpected system sleep, shutdown, lights or fans also call for an SMC reset.
Read and follow the steps.
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 choosing Sleep. 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 SMC on portables with a battery you should not remove on your own
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if it's 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.

Certain applications overwork my macbook and the fan goes crazy. Is there a fix or solution for this?

I purchased a 13.3" MacBook Pro in February of 2010. About a month later, I began to notice that certain applications that don't require much, Safari, MSWord, iTunes, were causing the fans to kick in at crazy speeds and the base of the computer was too hot to touch. Is there a patch or fiz for this, or should I return my macbook for a new?

try an SMC reset: http://support.apple.com/kb/ht3964

Can an error in battery cause a slow CPUS and the fan to run non-stop?

tthe battery need serviced but my computer runs slow and the fan is running non-stop. MacBook Pro 13" purchased around 2011.

OK, you really need to dump that Windows attitude quickly, because what worked over there is completely useless here. I never understood the "upgrade didn't work obviously, because this or that happened, so how do I downgrade." I hang out around here, and I haven't seen many comments about fans running full blast after the updates. I did them, and nothing happened.
First, you can't downgrade the firmware EFI update. I think if you tried, it would brick your MBP.
You could reinstall Lion if you wanted, but that's really a pain, and once again, one of those Windows things that people always do that wastes time. A security update and Remote Desktop Client (which only runs if you start it up) would not effect your fan speed.
Apple does have "restore points", but it's a real backup system that requires a backup drive. It's called Time Machine and it's preinstalled on your Mac, easy to use, and allows you to go as far back in time on your Mac as the size of your backup drive will allow.
Now, after all that, let's try to figure out what's going on with your fans. First, did you do the EFI update correctly? Meaning did you do it when the MBP was actually plugged into the wall? What are you running? Games? Videos? Something else?

My MacBook Pro is really hot and the fan is on constantly. It didn't use to do this, does anyone know why this is happening? I have a very short battery life, so I have to keep it plugged in probably more than I should.

My MacBook Pro is really hot and the fan is on constantly. It didn't use to do this, does anyone know why this is happening? I have a very short battery life, so I have to keep it plugged in probably more than I should.

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, 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.

I have a dual 1.8 ghz pwer pc g5 and sometimes i put it in sleep mode and come home on my lunch break and the fan is running at full speed and the computer has frozen up...what is going on here?

and sometimes i put it in sleep mode and come home on my lunch break and the fan is running at full speed and the computer has frozen up...what is going on here? is it a virus or has my computer been hijacked? it cant be good for the computer...anyone ever had this problem..?

Your problem has been reported many times, but causes are as varied as individuals.
Can we assume that a hard shutdown allows a normal restart?
Can I assume that you have used Disk Utility from your OS X install disc to repair the hard drive directory? The freezes and hard shutdowns require that the drive be repaired (not permissions) or soon the machine won't boot at all.
If the root issue is software related, in Console (the application) under Logs, there should be loggings around the time of sleep and logs that tell you what process went wild and froze the machine.
Network activity is also a common casue.
Other info:
http://support.apple.com/kb/ht1776
If hardware related, such as an external drive, other USB device (Wacom tablet) or USB PCI card, ejecting, disconnecting, removing, or in the case of the Wacom, updating drivers, are all potential remedies.

2008 Mac Pro Monitor loses picture, computer becomes unresponsive and the fans run fast.

My early 2008 Mac Pro is dropping the signal to the monitor and the fan on the back begins to run at max speed. I have to do a force shut down and start again. It will then run ok for several hours. This typically happens when it wakes up, I log in and begin doing a task. However, it has been known to do this at a random time. This has progressed to a once a day event mostly in the morning after it has been sleeping for several hours.
I pulled the cover when it did it last and pressed the diagnostic button. LED's for the GPU and PWRG did not light.
I am wondering if it is the power supply beginning to fail or if it is the logic board or, is it something else.
Can anyone help with this?
Thank you
Processor 2 x 2.8 GHz Quad-Core Intel Xeon
Memory 6 GB 800 MHz DDR2 FB-DIMM
Graphics ATI Radeon HD 2600 XT 256 MB
Software OS X 10.9.5 (13F34)

When using the Hardware Monitor software (from http://www.bresink.com/osx/216202/Docs-en/faq.html ) -- i emphasized the stuff in red
The sensor X shows the reading Y. Is this normal?
If you want to find out whether a sensor value is within normal limits, please select the menu item Window > Show Overview (or press ⌘+1) and look for the limits in the third and fourth columns of the sensor table. They contain the known official limits Apple has specified for readings acquired at the given sensor locations. If no limit is given in the table, this either means that it does not make sense to specify a limit for this particular sensor (e.g. the battery capacity should not have limits), or Apple hasn't published any specifications for this sensor.
Note that all up-to-date Macintosh models automatically shut down or enter sleep mode if one of the readings exceeds a critical limit. For this reason it is impossible that your computer can be damaged in an overtemperature condition.
For old computers without temperature managment, no limits have been specified by Apple. In this case use the following limits as orientation:
Most older G3 or G4 processors are designed for a maximum operating temperature of 105 degrees Celsius (221 degrees Fahrenheit), measured at the chip die of the CPU.
G4 processors of type 7455 or later (typically used in Macintosh systems with 867 MHz and above) are designed for a maximum operating temperature of 65 degrees Celsius (149 degrees Fahrenheit), also measured at the chip die of the CPU.
Most desktop hard drives are specified for a maximum operating temperature of 55 degrees Celsius (131 degrees Fahrenheit). For exact information, use the Drive Overview window (⌘+8) to get the manufacturer and model code of your hard drive, and then direct your web browser to the manufacturer's web site to download the official data sheet for this drive. The temperature limits are always specified.
==================================
And don't forget you can look at the fan speeds (there are several in the Mac Pro) - that sometimes will give you a hint something abnormal is going on if the fans start running a lot.

Macbook didn't fall asleep and the fan was running?

I closed my macbook this afternoon and expected it to fall asleep like every other time, but after getting back this evening, I noticed the fan was running as if it was hot, it wasn't asleep, and I had to reboot using the power button in order to get back into Mac OSX. What is going on here? Does this happen on occasion? Or do I need to take it in and get it fixed? This is the first time it has happened and I've had it for about a month and a half. Thanks for your info.

No. If something would have overheated, it would have shutdown completely, and the fan wouldn't have been running.
When your OS stops communicating with the hardware, the fan kicks in to protect the computer from catastrophic damage. Same with iMacs, Power Macs, etc. By running, it actually protected the MacBook. You should be fine.
-Bmer
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Its just stops, freezes, and the fans come on.....

This the third time in 2 days. I have been using my Imac for a year with no problems. So I'm not freaking out but like an a** I didnt get apple care. Oh I have a business so I can buy it. Whatever. In cases any fellow mac-ers didn't know if you have a business you can buy apple care after the original warrenty runs out.
Anyways
My (baby) Imac will just freeze and about 30 seconds go by, and the fans come on like a helicopter. I let it sit for a cople of mins and saw no change. I just turned it off. Has anyone experianced this?

Shifty, could you please post where you got the information that you can buy AppleCare after your warranty runs out? As fas as I know, it can only be purchased before or on, the last day of your original warranty.
As to your fan problem, look and see if your serial number is among those in Apple's Repair Extension Program, if so, your repairs, which probaly will include a new Power Supply Unit and logic board, will be made under the extended warranty.
Please post back with the information,
thanks,
Miriam

MMacBook Pro (13-inch, Mid 2010) switches on but internal display remains off/black .There is no start-up sound and the fan starts off normal but after about Five minutes begins to run even faster

Hi ,
My MacBook Pro (13-inch, Mid 2010) switches on but internal display remains off/black .There is no start-up sound and the fan starts off normal but after about Five minutes begins to run even faster as if the machine is running a heavy load.It displayed a question mark some time back then a friend borrwed it ,he flashed the system and put windows 7.Then a few days pasted and now it wont display as stated.I have tried to Reset SMC and the Command + P + R + Power but still no response.Please assist?
Regrads Josh

I think your "friend" caused a problem (or two).
I do not know what "flashed the system" means......
Based on what was done, I would probably erase the HD and restore the system from a backup before the software changes were made.
Barry

Heat and the fans not kicking in to chill things.

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