Intel Mac :: Fan Runs At Full Speed On Start Up Of It?
Jun 7, 2012
Our iMac is 18 months old and three times in the last few months the fan has switched on at full speed as soon as I press the power button. If I disconnect the computer from the power source and turn it upside down before reconnecting and starting it up, the fan will then work normally. Has anyone else had this problem? I guess the answer is to take it to a service centre, but I thought I would see if there is a simple resolution to the problem first.Â
Info:
iMac, Mac OS X (10.7.4)
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Aug 27, 2014
My iMac runs perfectly fine; more or less as it did when it was new. In OS X, when I shut down the computer, the fan runs at full speed indefinitely, unless I unplug it or boot back up. When running, the fan is perfectly normal (increases speed a bit when doing something taxing). I've never heard it at full speed before until this started happening. After following the SMC reset procedure with no luck (I'd like to add that the SMC reset only says it relates to fan problems when the computer is ON), I searched a bit and noticed there are one or two cases where a problem like mine was believed to be a motherboard issue, and therefore a costly fix.Â
However, here's the fun part. When booted into Windows 8.1, shutting down the iMac does not cause this issue to occur. It stays silent, as it should, even if I disconnect then reconnect the power. This leads me to believe it's unlikely to be a motherboard issue. However I've wiped, restored, and reinstalled fresh copies of Mountain Lion, Mavericks, and Windows 8.1, and the result is still the same: if I don't want to have to unplug it from the wall, then I have to use Windows to shut it down.Â
So then, my questions are these:
-What is the difference between shutting down from OS X and shutting down from Windows?
-Is an operating system allowed/able to touch BIOS settings?
-Is it possible to still be a hardware problem, given this difference?Â
My default OS is OS X, and it makes no difference if I change that to Windows. I also did a PRAM reset, even though that has nothing to do with fans...
Info:
iMac, OS X Mavericks (10.9.4)
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Aug 21, 2014
Air book fan runs at full speed
Info:
MacBook Air
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Dec 30, 2007
I recently purchased an X800 and installed in my G5 1.8DP (OS X 10.4.9) with the intention of having something to drive my shiney new 30" Cinema display. All booted fine and, in glorious wide-o-vision, I spent the next 30 mins playing with all of this extra screen real-estate. At that point, I started to notice that things were not as quiet as I'd initially anticipated.
In fact, the amount of fan noise was so high that I'm not going to be able to use the new card as the machine is part of a project recording studio installation. Doh! So, a quick trawl of the ATI web site lead me to the ROM updates claiming to address fan speed control.
Update to the most recent version of the ROM and no change. Similarly, I've installed the most recent version of teh ATI control panel.
Odd as other people seem to be saying that they're not experiencing the same problem. And strangely, the GFX card fan runs at a low "normal" speed in Safe Boot mode whilst installing the ROM updates.
Information:
G5 1.8DP + Macbook Pro
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Oct 19, 2008
I have an early 2008 Black MacBook with 4GB of RAM and the stock 160GB hard drive. Sometimes, when I have only Mail and Safari open and am just browsing emails, the fan starts to run full speed, and the internal temperature reaches 180. This often happens when the Mac is actually idle and only displaying the screen saver! The room I'm in is rarely over 75 when this occurs. I don't really have any intensive login services, just a GMail notifier and things like Suitcase and iTunes Manager.
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Jun 22, 2014
I tested it out and the fan only turns on full speed when I start to watch Netflix.
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Apr 10, 2012
My iMac does not start up as usual. I now get a ' start up disk is full. You need to make space available on your start up disk by deleting files' message. Â I am able to key my log on password however I just get the purple galaxy screen with no desktop.Â
If I try to use the keyboard I get a tone when pressing the keys. Â
Has worked perfectly well up until I got this dusk full message. Â
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May 18, 2012
Machine: iMac intel core 2Â 2.66Ghz Model A1224
sn# YM******ZE3Â
Ran the hardware test by pressing 'D' key. hardware test came back with error :4SN/1/40000000: T00P-65.250Â
I am guessing some sort of temp sensor might need replacing.Â
Info:
iMac
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Apr 8, 2012
My Mac OS X as soon as I turn it on the fan is running. I have already gone thru the reset SMC . Could I have too much stuff in it?
Info:iMac, Mac OS X (10.5.8), 2.66 GHz Intel Core 2 Duo 4GB 1067
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Apr 11, 2012
I have a 27" iMac that I recently took to the Apple Store to have the LCD replaced. When I got my machine back and started it up, the fans kicked on full speed and will not stop...this didn't happen prior to me taking it to repair...it ran nearly silent.My firmware and so forth is all up to date.... I downloaded SMC Fan Control to see what was going on... my computer is operating at 97 degrees farenheit. but my CPU fan is spinning at 4035 rpm. That's crazy over the top. Optical drive fan (with no disk in it) is spinning at 3736rpm...and my HD fan is at 1098rpm (which is probably about right.Â
Info:
iMac, Mac OS X (10.7.3), 27" i5 2.66 Ghz, 8 gb RAM
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Dec 20, 2007
I am interested in adding a webcam to my desktop Imac (power pc)- Isight is no longer available- an option that I found is the Ecamm Image- but apparently it is USB and not firewire and it will only run with high speed usb- how do I know which type is on my computer? I checked system profiler but quite frankly wasn't sure of the designations.. does anyone have any experience with this camera, by the way? is USB 2.0 by definition "High Speed"?
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Mar 9, 2012
Im getting an error message that states Mac OSX start disc has no more available space for application memory. Also color wheel continues to spin with no progress. Computer gets hung up. Computer is only months old.
Info:
iMac, Mac OS X (10.7.3)
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Jul 5, 2012
my mac keeps flashing up with my start up disk is full. i have emptied the trash? what i can do because i cannot load anymore pictures?
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Jan 15, 2008
As stated on subject, the fan in my PBG4 runs at max speed from the laptop starts. I have tried to reset NVRAM, PRAM, PMU, but no luck. The laptop is not hot at all.
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Feb 27, 2012
When I start my new iMac, I get a message that the Start Up Disk is full.
Info:
iMac, Mac OS X (10.7.2)
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Mar 10, 2012
trying to down load music and it keeps saying the startup disk is full
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Apr 18, 2012
Bought this iMac not quite a year ago. I had very few files - some pictures and music mostly. Tried to update ANYTHING and kept receiving "start up disk is almost full". Burned pictures to disc and deleted them. Also, accidentally deleted all music as well. I am still receiving the error message. I called Apple and removing media files was their suggestion as well. I have no idea what to do next - I have no "tech savvy" Processor 2.7 GHz Intel Core i5Memory 8 GB 1333 MHz DDR3Software Mac OS X Lion 10.7.2 (11C74)
Info:
iMac (21.5-inch Mid 2011), Mac OS X (10.7.2)
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Jun 24, 2012
My system keeps on saying that my start-up disk is full
Info:iMac
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Apr 14, 2012
From a cold startup my Macbook pro 13 fan runs continuously at high speed.
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Feb 17, 2012
I have been trying to upload photos from new Iphone we took on vacation but will not upload all photos because it says the start up disc is full
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Imac, Mac OS X (10.6.2)
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Apr 27, 2012
start up disc is full on my imac but cant seem to locate the file to delete, it show that i have 236gb usage and 14gb free space. and i have deleted all my movies, pics and music so i dont understand where the 236 gb usage is from.
Info:
iMac, Mac OS X (10.7.3), i have delete my movies,pics, music
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May 22, 2012
my iphone won't sync to my computer because allegedly because my start up disk is full even though I've emptied the trash &Â deleted large files.Â
Info:
iMac, Mac OS X (10.7.4)
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Jun 15, 2012
I have had my imac for 8Â months with 500gb space. It is saying my start up disk is full and when I check where the space is allocated 435 is in mail. I have tried deleting mailboex( I do have 4, 2 are IMAP and 2 normal) But the beachballs just roll.
Info:
iMac, Mac OS X (10.7.2)
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Jun 25, 2012
Macbook Air isn't a year old and I don't leave it plugged in ever. The battery might last 2 hours and gets very hot. In addition the fan runs at a very high speed. The computer won't shut down in a normal way. I have to hold the power button down to shut it off.
Info:
MacBook Air, Mac OS X (10.7.4)
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Oct 10, 2007
I purchased my PowerMac G5 in 2003 and no problems till now. My problem is that on startup, the display first shows gray screen with a globe in a white box flashing in the center of the screen. This continues for about 90 seconds --- then the globe in box icon changes to a small file folder icon with alternating face/question mark flashing in the file folder. At about the same time, the fan speeds up dramatically. The fan continues to run at this high speed for about 90 additional seconds, then the fan returns to normal speed, and the startup continues normally to the blue screen. Once startup is complete, computer runs okay. The whole process takes about 4 minutes.
Information:
PowerMac G5, 1.8 Ghz, OS X 10.2.8
Mac OS X (10.2.x)
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Nov 22, 2008
I purchased a used ibook from owc in January and have had it back to them twice for repairs. Lately, it stopped booting up again and they told me to use [URL] to take the mobo out and ship it to Arizona to have the solder refloated. I did and got it back, put it together and it would boot up, only to run for 15 minutes and shut down. Thinking I missed something, I dissasembled it today and reassembled it. Now it turns on with a blank screen, the fan runs on high, and it will go no further. I tried to reset the power manager, reset the p-ram, the hard drive is only a few months old and my brain is getting fried with frustration.
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Jan 13, 2010
I need to find a better download management application than Speed Download. Whenever I run speed, and download more than one file at a time, my memory usage skyrockets and maxes out. System runs VERY sluggish, and i basically can't use my MBP until downloads are done.
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Mar 23, 2012
I have taken everything off my desk top and backed it up and it's still saying the same thing! I've also emptied the trash. I get it when I try to use Photoshop.
Info:
MacBook Pro, Mac OS X (10.5.8)
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Jun 5, 2012
I have a mac book pro...one of the older models...around 5 or 6 years old..the silver one with the silver around the screen part. Running Mac OS X 10.6.8,
2.33 GHz, 2GB ram.Â
Lately my computer has been rediculously slow with everything, but aside from that my issue is with my start up disc. I would have over 1.5 GB of space left, open up a photoshop file...make some alterations and save...and all of a sudden I have NO SPACE left. These alterations created the photoshop file to be like 50mb more. Its a 200mb file. So how can I go from 1.5 gigs to saving a 200mb .psd file and all of a sudden 0 hd space?Â
Sometimes I couldnt even save the .psd because when I opened it all of a sudden I have half a gig now. And even if I had half a gig why wouldnt I be able to save? I go to save and sometimes it says "your start up disc us full" - Is this different than my harddrive?Â
Is photoshop using some sort of weird caching thing?
Info:
MacBook Pro, Mac OS X (10.6.8)
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Mar 21, 2012
I recently upgraded the RAM on my iMac PowerPC, but after installing the new modules, nothing would come up when I boot it. It gives me 2 (or three) of the "dial tone" beeps, the light flashes on and off and the only thing running would be the fan, running at an ultra high speed.I did install the correct modules, which are 2 x 1gb 184 pin DDR PC3200 400mhz ones, but I realize that they are high density ones. Dumb question here, but would that be the problem?
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