NEENJA  I'm running an early 2008 Macbook Pro Intel 2.4ghz core 2 duo..

I noticed that when I boop up my mac, before running smc, istat pro shows my fans running at rougly 2000rpm. I set my "default" smcfancontrol speed at 4000rpm.

When you quit smc, isnt it supposed to set it back to regular default? Which my guess would be 2000rpm, since that is what the mac started with upon bootup. This is not the case, I quit smcfancontrol and check istat, it is still saying that the fans are at 4000rpm.

Is this a bug?  
(Version 2.2.2)

RUBAIYAT  Won't install on my White iMac 24" 2006.

I found http://www.derman.com/iMac-Fan-Control to give better control.  
(Version 2.2.2)

WYRML0RD  Greetings,

This Rodian is wondering if the SMC Fan Control 2.2 that I downloaded is doing the trick. I have a 2006 Mac Mini with the Snow Leopard OSX, and had the logic board replaced, but now the fan is on full bore at all times. The SMC is telling me that the fan is running at ~5500 rpm's, and I turned down the settings as low as possible, but still loud and cranking!

Thank you for any insights,

WL  
(Version 2.2.2)

STRUTTER82  Does what it says it does! Try it!  
(Version 2.2.2)

YABA-DABA-DO ;-)  This tip/hint is for the person that says smcFanControl resolved his/her noisy machine. As the story goes about 9 months ago my 20"imac was making and awful noise and i started asking around and figured out it was my right side case fan. My machine was still under factory warrantee so i took it in and sure enough thats what it was. The technician told me the bearing mechanism failed, so by turning up the rpm has some what temporality masked what is a serious problem with your machine!..;-)  
(Version 2.2.2)

CDRATES  My mac was making horrible noises and this did the trick to get my fan under control.  
(Version 2.2.2)

DR. GIRLFRIEND  Ordinarily, smcFanControl is a very good app, but I'm having an issue in Snow Leopard that I'd like to make others aware of: SMCFC randomly shuts down without warning. This has happened numerous times after a reboot or after waking the computer from Sleep. It's happened on a clean install of Snow Leopard and I didn't notice until the temps were running quite high on (Original 2006 MacPro) and my fans kicked up a few decibels on their own, alerting me to the problem.

Please note: I don't this this is SMCFC's fault; I think this is a Snow Leopard bug as I've noticed other instances of the O/S not remembering various preferences (keyboard modifier keys, Wacom tablet settings, etc) or apps that I've set to open automatically at login. Hopefully Apple will have a fix soon. In the meantime, keep an eye on your system because SMCFC isn't 100% stable on Snow Leopard yet.  
(Version 2.2.2)

L0XBY  If you have an Intel iMac, I would recommend this instead:

http://www.derman.com/iMac-Fan-Control

It allows you to adjust the rate at which the fans speed up by setting the lower/upper threshold.  
(Version 2.2.2)

JERSUCH  Hi, I installed the app on my new macbookPro with core2duo processor.

when i set the settings to High RPM and saved it, it activated and i hear the fan accelerating but when it has reached 5000rpm it reduces it speed automatically back to the default macs speed.

what can i do about it?

is there a fix?

Also i only see the exhaust and no other fans, is this normal?

thx   
(Version 2.2.2)

POOHSTICK  Re. smcfancontrol: I like Apple menu menu, but found installation not so perfect. In these days of spyware, I need every reassurance of integrity, this app seems a bit tatty (hence not so confidence building). But it seems to work well.

My use is on 09 Mac Pro 8 core on Leopard 10.5.8. I find that playing any sound roasts the CPU. The smallest sound play can cook Core A up to 90C. Internet radio (Firefox or Safari) can leave temps high (this under virgin Leopard 10.5.8) until app quit. However Quicktime Player sound causes temp jump until sound stops, then temps decline.

This seems a serious MacOS bug.

Testing with 100% load on 16 cores for several minutes only got the temperature up to 61C (no smcfancontrol).

I made 3 settings for smcfancontrol, names 1, 2, 3, ... Each higher fan settings. So I can easily boost fan as temps rise.

My setting 3 is:

EXHAUST 889

INTAKE 889

BOOSTA 938

BOOTSB 800

It would be useful if i could see my setting number in the Apple menu.

Anyone have pointers to temperature limits for Nehalen CPU?

Or links to info relating to 2009 Mac Pro sound/heat problems?

I like smcfancontrol, thumbs up to developer and I hope he continues to refine it. I'd quiet like to see a graph of historical fan speeds overlaid with temps, but perhaps this is more in Temperature monitor's domain.

Of course I'd like fan speed to automatically respond to hardware temps, but that is the OS's responsibility. Apple seems buggy or weak in this area.  
(Version 2.2.2)