IMac :: Controlling Max Temp Of Fans / Booting From External HDD

Nov 20, 2010

I have a 2007 Intel 24" iMac (Last of the white plastic editions) and I've recently had troubles with the 7600GT Graphics card. The computer would get strange artifacts all over the screen, before crashing. Unfortunately, it is out of Applecare, so I took it into a shop and had the card replaced. Upon receiving it back, they told me that they replaced the graphics card, but still found problems with it booting up inconsistently. After some testing, they realised it was the Hard Drive controller at fault, and put my harddrive in an external USB enclosure and booted it off that instead. This was an easier solution than replacing the entire logic board, they told me. (and they gave me the enclosure for free).

Now I've brought it home, and set it all up, only to find that the HDD fans are constantly spinning at 5600 RPM, which is deafeningly loud, even so over my room fan. I presume this is because there is no longer any hard drive controller/hard drive in there. I've installed SMC Fan Control, but to my dismay you can only set the minimum fan speed, and not the max. If possible, i'd like to set the max fan speed at a much lower rate, without needing to open up the iMac. So my questions are:
Is there a way I can set the max fanspeed for the HDD, or disable it since there isn't one in there anyway? And is there a better solution for booting my iMac OS onto an external HDD? (i.e. Should I look into buying a firewire 800 drive enclosure instead of this USB 2.0 one?)

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IMac (Intel) :: Installed SSD / Constant Fans / No HDD Temp Sensor

Dec 10, 2014

I've recently installed a Crucial M500 512 GB SSD into my 21.5" 2011 iMac. I've done this to quite a few iMacs, and am well aware that some have a temperature sensor on the factory-installed hard drive. This one, however, did not, and now that the SSD is installed, I'm getting constantly running fans. 

The fans run whether it's booted from the internal SSD, an external FireWire HD, or even if it's sitting in Target Disk Mode or on the Boot Options screen, so I feel like it's hardware-related. 

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MacBook Air :: Fans Run Even When Cpu Temp Has Lowered To 50C?

Apr 2, 2008

using Ichat the other day running a full screen chat, and I saw the temp of the CPU rise to about 65C and the fans started spinning up 6200.... That was understandable as the CPU was under load... but after I closed the ichat down, the CPU temp dropped down to about 50C but the fans stayed at 6200 for a long period of time. probably about 10 minutes or so... then they slowly crepted down to 2500.

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MacBook :: Finding Maximum CPU Temp - How Many Fans Necessary

Jul 24, 2009

I have a fan utility that lists 2 fans. The "Left" fan is at 6204 rpm's, temp 81.4C The "Right" fan shows 0rpm's, temp -1C. Is this merely because the sensor is capable of recording two fan speeds or do I really have one malfunctioning fan? (which would explain the high cpu temp, if it applies).

A third sensor, a widget, records the same temp, with Heatsink A 70C and Heatsink B 64C. I realize all three sensors are getting their readings from the same spot; which one do I rely on?

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MacBook :: Temp Go Up Absurdly While Running VisualHub / Fans Run Over 6000 Rpm And CPU Hit 92c

May 21, 2009

So I know there are a few other discussions regarding this subject but none of them are providing me with the info I'm looking for. I am looking to get a few responses on other MacBook Unibody's (Pros welcome too) temperatures when running intense programs (games, video conversion, etc.).

So here's why I am concerned. When running VisualHub in particular, my fans and temp go up absurdly. According to iStat, my fans are over 6000 rpm and my CPU temp hit 92c the other day. I shut it down bc I was having visions of my MB melting in front of me. I have even gone as far as propping up the back to allow for more air flow but that hasn't made any difference as long as I use pretty much any video conversion apps. Games (like Spore) make it hot, but not like this

I can find links to the previous MacBooks temps (which I had and this was never a problem) but nothing on the Unibody's. So please everyone, do share. Please include what apps you were running or if your MB's ever shut down from overheating.

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MacBook Pro :: Won't Install Firmware Update / Can't Work With Fans And Temp

Feb 8, 2010

I'm nervous to install the Firmware update 1.3. As I've heard from a lot of people the update has crashed their mac. I know it has to do with the fans and temp. My Mac book pro is running at 135 F at 2000rpm is this ok? Is it too overheated. Should I install the firmware I'm so nervous to install it just in case it breaks. Here's the rest of my specs...

Model Name:MacBook Pro
Model Identifier:MacBookPro3,1
Processor Name:Intel Core 2 Duo
Processor Speed:2.2 GHz
Number Of Processors:1
Total Number Of Cores:2

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Mac :: Constant CPU Usage & High Fans Speed Temp On Black Santa Rosa MacBook

Mar 11, 2010

I only started noticing my fan running a bit on the fast side this evening after installing the new Safari 4.0.5 update. I looked at iStat Menus for temp and CPU. And I was seeing about 190 degrees F for CPU temp with lid closed running ext display. Also there was a constant usage of the cpu (about 30% User and 20% System). There's not one particular process I can see in Activity Monitor that acting out of the ordinary and using a lot of CPU. Just stuff like coreservicesd, WindowServer, launchd that are shuffling around and using about 1-4% of CPU.I ran repair disk permissions and verify disk. Verify Disk found errors and said I need to repair my Macintosh HD, which I have now done successfully.

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PowerPC :: G5 Not Booting - Fans Are Spinning

May 25, 2009

I opened up my G5, to install more RAM, and saw that one of the hard drives was unplugged (I just got it used), and so I connected that, blew some compressed air into it, installed the RAM and closed 'er up. Then I tried to power on and it didn't work (No Chimes, just fans spinning, no video, not even the start up chime). So, I disconnected the hard drive, took out the RAM I put in, and closed it, and it still doesn't boot. Same thing. My keyboard is wireless, but the wireless dongle thing doesn't get any power when it is "powered on". The fans are spinning all the time. (Except when it's powered off, obviously)

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MacBook Pro :: MBP Not Booting, Now Fans Run 6000RPM?

Jul 1, 2009

Just been having some pretty big issues with my late 2007 Macbook Pro.Basically, the other day I was playing World of Warcraft, when my Macbook ran out of juice. I plugged in the charger, left it for a few minutes, but no, it wasn't going to wake up again.

So I turned it off, and that was basically it. It wouldn't turn on again, regardless of whether or not the charger was plugged in. Eventually I got it to boot by doing an SMC reset, but now the fans run at 6000RPM and it says it's at 0C and the fans are running at 0RPM.Which is making me believe that the temp sensor is screwed.

Also, it no longer detects my battery, and Windows simply doesn't boot. Mac OS does, but again, I get these issues. System profiler says that my battery has 0 capacity, 0 charge cycles, it is not charging, and it's essentially dead. However, if I unplug the charger, the Macbook continues to stay on, though I can't say how long this is for.

I'd also like to make it clear that the fans start running at this speed from the second it starts up, right before the grey screen appears.I've tried PRAM and SMC resets multiple times with no luck, and I'm wondering if the logic board is just partially fried or something.Hopefully you guys can help me, and no, it's not under warranty, though I do have home insurance which has covered this Macbook before after it got sat on and the screen was crushed.

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IMac :: Booting From USB External HD From Intel On PPC

Apr 28, 2009

My Intel MacBook is in the shop, and I swapped out my hard drive before I sent it in and put it in a USB enclosure. I was able to boot my friend's MacBook Pro from the drive, but my G4 Mac Mini is not seeing it as an option (upon startup or otherwise). I can read files from it, but I really need to boot from the drive for some other things (cookies, passwords, and especially the ability to sync my iPod touch).

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PowerPC :: Fans Ramped Up And Machine Not Booting

Aug 21, 2008

I'm running a Dual 1.8 GhZ PowerPC G5, with 1.5 gig of RAM. I recently replaced the power supply, as the one that came with the machine died. I left the machine running last night, and this morning I found the fans ramped up as high as they could go, and the screen telling me that one of the external devices had been disconnected improperly. (This had happened once or twice while I was using the computer before I went to bed. Couldn't figure out what the problem was.) I shut down the machine by holding down the power button. When I turned it back on again, it wouldn't boot. I get the startup chime, and the main HD spins up, but the screen remains blank (the light on the display still works the way it should).

I was somehow able to get the machine to start from my backup drive once, so I verified and repaired the main drive. It checked out fine. I tried another restart, and the machine wouldn't boot again. It has since refused to boot, getting no farther than the startup chime. I've tried pressing the power management button. I've tried booting from the Leopard disks, and I've tried zapping the PRAM. However, it appears that the keyboard isn't having any effect, as the last two didn't work either. I've removed and reseated one of the RAM cards, but haven't had a chance to try the rest yet.

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IMac :: Booting From Firewire External Hard Disk - Windows Drive

May 15, 2009

So here is my bright idea. I still may want to have Windows on my iMac for work projects *sigh* I think I came up with a solution, I rather not partition my iMac (when I buy it) 1TB drive for Windows. Don't want Windows on my main disk - I need the storage for Mac things, personal stuff etc. Is it possible to boot from a Firewire connected external HDD to run Windows?

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OS X :: Won't Stop Apple Remote Controlling Both AppleTV And IMac At Same Time

Feb 3, 2010

I have this annoying problem with my iMac in the same room as my Apple TV and whenever I use my Apple TV Remote, it also turns on a movie on my iMac and that bugs me. Sure I could turn down the sound so I don't hear it but that does not solve the problem.

Is there a way to pair these remotes, I have one for my iMac and 1 for my ATV, and whenever I play something on my ATV it also starts a movie on my apple, usually a different movie. Can they be paired separately somehow so they are controlling only the unit they are suppose to be with?

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MacBook Pro :: Won't Work With CPU Temp / Sending Warning For High Temp

Mar 19, 2010

I downloaded a program to monitor my late 2008 unibody Macbook Pro's temperatures. Just a few minutes ago while playing music/playing an ONLINE game real briefly it warned me that my CPU temperature was too high. (167˚ F) Is that too high of a temperature? What should the "range" be?

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OS X :: Unable To Work With CPU Temp / Can't Control Temp

Nov 1, 2009

I was just adding some Quicklook plugins when my temps started to soar. I have restarted, repaired permissions, removed said plugins, and tried other accounts. Nothing is lowering the temps. Weird thing is is Activity Monitor is showing NOTHING using the processor nearly enough to jump my temps to 85 C with nothing running.

I'm "controlling" the issue for now by ramping my fans to full speed. Even with this I am hovering around 70 C...a good 10-15 C above what I am normally at (and was at 30 minutes ago).
*Note: Normally running fans at 6000rpm would give me temps in the mid to low 40 C range

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MacBook Pro :: Won't Work With Temp / Temp Rise After 10.6.3

Apr 6, 2010

I have a MacBookPro5,4 2.53GHz with one fan and only the 9400M. After updating to 10.6.3 the operating temperature seems to have risen from about 43 degrees C to about 48. It has been getting warmer here in Japan so the ambient temperature is different but I still think this rise in temp. is due to the update. I have smcfancontrol installed and set to 2500rpm instead of the normal 2000, but it seems to be not enough to keep the temp. under control, as it did before the update. Any relatively hard use of the cpu and the temp goes up to 60 degrees.

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MacBook Pro :: Plugging In External Firewire Audio Interface Raises Temp?

May 12, 2010

Today I connected my Mackie Onyx Satellite Firewire audio interface to my 2.4 Ghz 13" Macbook Pro for the first time. After it had been running for a while, I looked at iStat Pro, and it reported a CPU temperature of 67C, which is about 15 to 25 degrees hotter than this machine usually idles. Now I've looked around a little bit and found that it's a known issue and associated with the Agere Firewire chipsets. Is there any solution for this? Does it make a difference if you use a daisy chain setup with an external hard drive in between the computer and the audio interface, or a repeater cable, or anything of that nature?

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IMac :: How To Find Out The CPU Temp

Sep 23, 2009

How do I find out the CPU temp of my iMac? Its Intel 2007, running Tiger. Also, what is the idle CPU temp of this machine?

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IMac :: Unable To Work With Temp / Frozen

Apr 27, 2009

It just froze on me about 20 min ago. All I was doing was listening to iTunes and browsing the music store. I looked at the temp of the computer and it seems kinda high, I don't know too much about this.

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MacBook Pro :: Fans Suddenly Making Wierd Noises / Fans Are Hitting Something?

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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OS X :: Booting A Mac Book Pro From An External HDD?

Mar 23, 2010

how to make a clone of my 10.5 current Drive (using superduper) and then booting from the external and upgrading (the external) to 10.6. the logic being that I could run 10.6 and my mac from my External Drive and then revert back to 10.5 when I boot as normal...

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OS X :: Booting From External Drive ... On PC?

Feb 21, 2009

My step dad is showing some interest in my Mac and wants to give it a go. I was thinking of installing OS X on an external drive and booting directly into it from his PC. Is that possible?

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IMac :: Imac 27" Brief Mechanical Ejection Sound From Dvd Drive When Booting Up

Dec 2, 2009

Had a quick question. I'm on my third 27" stock 3.06Ghz imac that was replaced yesterday. The good news is that so far it doesn't seem to have any of the problems of my previous two 27" imac's. There is one thing though. A couple of seconds after pressing the power button to bootup there is a brief mechanical sound from the dvd drive like a quick ejecting sound even though there is no cd in the drive. My first 27" imac dvd drive made the sound but the second imac 27" Imac I had didn't. Is this sound normal? Would be curious to know why two out of the three 27" Imac's I had make that noise.

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OS X :: Will External Display Work While Booting From DVD

Jan 11, 2009

Will the external display work while I boot from the Leopard DVD? My MacBook Pro screen is broken and I want to make an .img file of my HD before I install the new LCD.

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OS X :: Stop Booting From External Drive?

Jun 26, 2009

I have a mac pro running Leopard with Time Machine backup on an external 500GB FREECOM drive. My issue is that I cannot boot my mac while the drive is connect, because it seems it tries to boot from the external drive and it starts displaying a flashing folder with a question mark in it. So everytime I need to fire up my machine, I need to disconnect the external drive > boot > connect the external drive.

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OS X :: Booting From External Drive With No Internal

Jul 12, 2009

My MacBook's hard drive recently took a turn for the worst. I can't boot up from my external with the drive still installed. If I take my internal hard drive out can I then boot up my mac from my external?

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PowerPC :: Booting Powerbook G4 Via External FW 800?

Jul 2, 2010

I am trying to do a clean install of OSX 10.5 on my old powerbook G4 15". I am using a 10.5 image file on my external. I partitioned the external using GUID, and restored the image file onto the external. (this method works when installing on intel macs). Unfortunately, I cannot boot 10.5 using this method on my powerbook. Is it because i am using a firewire 800 cable? Should I be booting it using a firewire 400? I know that PPC macs cannot boot using usb, so i am stumped.

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IMac :: Fans Are Dumb, Run When Not Needed, And Don't When Do?

Nov 7, 2009

Any tips on how to fix this?Usually, the CPU fan is stuck at 4500RPMs constantly, CPUs 28?? it runs the fan at 5000RPMs.But whenever the CPU is cooking, such as 92?, it won't run at all, but the other two fans will be at full blast.

Any tips on how to fix this? I took the computer to the apple store 3 times for this issue but every time they "could not recreate the issue". The last time the replaced the fans in the computer, but that didn't fix anything.Anything that would point me in the direction of fixing this? It's just melting itself. Alum. iMac.

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IMac PPC :: G5 Desktop Won't Start And Fans Don't Run

Apr 3, 2012

I'm trying to fix a friend's G5 desktop, 1st generation. 1st LED comes on, 2nd LED comes on when I press start button. Power supply voltages are correct. Hard drive runs, but fans don't come on. I have power to fans. 5 and 12 volts. No beeps. Pressed SMU button as well, and nothing changes. Don't see any bulging caps. Someone else changed a few before I got it. Also jiggled RAM chips.


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MacBook :: Booting From External Hard Drive

May 7, 2009

Is it possible to boot from a external hard drive instead of my internal drive?

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