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发布于 2012 年 6 月, 型号 A1278. Intel 处理器，支持 Turbo Boost, 最多 512 MB DDR5 显存

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MacBook is overheating from idle to regular use

My macbook is at around 60 - 62 degrees Celsius at light use like web browsing and watching videos and the fan runs at the default 2000 rpm. Both the upper and lower body get uncomfortably warm to an extent that I can't touch it. Do I need to replace the fans or the heatsink?

Update (05/24/2017)

These are the stats for 20% CPU usage but the laptop is uncomfortably warm.....correction hot at the top and I can hardly touch the bottom!

It's super hot around the processor and the heatsink at the bottom and the whole top is quite warm.

The stats:

  • fan: 4945 rpm
  • ambient: 52 degrees
  • battery max: 43 degrees
  • CPU core 1: 74 degrees
  • CPU core 2: 71 degrees
  • CPU PECI: 74.1 degrees
  • CPU proximity: 63.5 degrees
  • GPU PECI: 69 degrees
  • heatsink proximity: 53.6 degrees
  • memory proximity: 53.1 degrees
  • memory slot: 57.1 degrees
  • palm rest: 41.1 degrees
  • pct die: 73 degrees
  • hdd: 46 degrees

Apps open in the background/everything minimized/ max cpu usage 20%:

  • Safari (had no web pages open)
  • mail
  • contacts
  • notes
  • calendar
  • reminders
  • maps
  • messages
  • facetime
  • iTunes
  • iBooks
  • app store

And when i closed all the apps without shutting down the CPU temp remained the same but the fan came down to 2000 RPM

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If the fans are spinning, I don't see a need to replace them.

The heat sink either, unless it is broken from a hard drop.

On the other hand, CPU compound is a good idea.

But what happened to cause this? After an update? A hardware upgrade? A previous repair? Some liquid damage? If you're not sure about liquid damage, or you think it never happened, open it up and look at the board specially around the edges near the LCD connector and where the USB ports are. Those are the places most commonly damaged by liquid. Disconnect the battery before touching anything and preferably don't touch anything on that board either way. Just observe and report back with your findings - if any, and pictures.

由完成的

Im not really sure. At first I thought it was the magsafe dc port as some of the connectors looked black, kinda burnt. But i changed it and also the thermal compound along the way. But still it gets quite warm.

Not sure about liquid damage though.

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@cam2363 Thanks for calling me in. My first thought on this is the heat sink. This one is liquid filled and can develop a leak and cause overheating. When it leaks it usually leave an oily looking residue on the logic board. If you see this then replace it.

UPDATE

MacBook Pro 13" Unibody (Mid 2012) Heat Sink

MacBook Pro 13" Unibody Mid 2012 Heat Sink Replacement

MacBook Pro 13" Unibody (Mid 2012) Heat Sink图片

产品

MacBook Pro 13" Unibody (Mid 2012) Heat Sink

$4.99

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yousuf unaccept the answer until you get a solution. Otherwise people will stop looking at and think your problem has been solved.

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I agree with Mayer here you likely have a bad heat sink. But you need to dig a bit deeper here with some better diagnostic tools. I would recommend using TG Pro it will allow you to see all of the sensors and what the fans are up to.

If you have access to a pinpoint non-contact thermometer you can even review the temps in the heat pipes and heat sink to see if the they are working correctly.

To visually see things you can use a FLIR scope for your phone which see's IR. Its a great tool to have for many different tasks!

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@danj that looks like a great tool, but for a professional. I use a Fluke IR gun (high end that ran me about $300. But there are acceptable IR guns on eBay that might not be as precise as the professional tools we use but at $10-15 would be acceptable for a DIY user. It's also one of my most used tools in the kitchen ;-) IR Laser Infrared Digital Temperature Thermometer Gun

http://www.ebay.com/itm/HH-Non-Contact-L...

由完成的

No, I agree a non-contact thermometer is the easiest to get and use.

But, for us left brained people who would want to see it visually, a cheap FLIR camera that plugs into your phone or tablet ($250) is also quite useful too!

We had quite a few systems come in with bad heat pipes so I spent the money on one. What I really liked was taking a snapshot to show the before and after. I've even used it for other things around the house like checking my windows for air leaks and heat loss within walls.

由完成的

I just reset the smc will test that out. If that doesn't work, will look at the heatsink.

Thanks alot you guys.

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yousuf-bilal1 - If you look at your numbers you'll see the CPU & GPU temps are very close to the CPU PECI & GPU PECI temps, yet the heatsink proximity is about 20 degrees cooler.

I can't say for sure the heat sink is bad just looking at these numbers but its clear the transmission of the heat is not as effective as it should be. I would start off making sure the fans and fin area are clean of dust build up and if you are up to it you might as well swap out the heatsink. Do make sure to clean off the old thermal paste and use a good paste to replace it. I personally like ArcticSilver.

If you have TG Pro running here take a snapshot of the main screen showing not only the current temps but the high-water markings. I find that a bit more useful than the straight numbers.

As a reference here's my 2011 MacBook Pro's view:

Block Image

I have a few Safari windows open, Pages & Mail running at the time I took this.

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I used mac fans controller. Don't know how to upload a picture here. I just recently cleaned the laptop of all dust and reapplied the thermal paste. I used arctic silver 5.

由完成的

We have a guide for that ;-} Take a look here: Adding images to an existing question

由完成的

Since you have cleaned and re-pasted the CPU & GPU. Can you tell us if this was as high before you cleaned & re-pasted? I'm wondering if you have a heat sink issue or if the thermal paste didn't get applied correctly.

由完成的

Yup it was the same before

由完成的

I guess thats it then replace the heat sink. If you have a good scale you should see a weight difference between a good and bad one, the good one will be heaver.

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Hi,

I would suggest use an app to control your fans, so that they spin a bit more faster which in turn will keep the temps down. I would suggest try using this app and see how it works. You could also try and re-apply your cpu compound which will help as well to reduce the temps.

https://www.crystalidea.com/macs-fan-con...

Hope this will solve your issue.

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Going off of what John said, I suggest smcFanControl. Its what I use and it works great.

https://www.macupdate.com/app/mac/23049/...

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I've tries smcFanControl but it didn't work. It didn't increase the fan speeds.

由完成的

Are you sure you did it correctly? Check out that video.

https://www.youtube.com/watch?v=HuTASN5p...

由完成的

I think so. Installed the software and increased the default fan minimum speed from 2000 to 3000 but it didnt change.

由完成的

Try some high number like 5000. See if you can hear it rev up.

由完成的

just tried macs fan control it works. I want to know which temperature sensor determines the fan speed on the mac because when the cpu cores are around 55 degrees the heatsink proximity sensor shows around 45 degrees and platform controller hub die is relatively more around 62-65 degrees. what might be the problem?

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