Why is my MacBook Pro’s fan coming on so often?
- Happens when browsing web
- Happens when watching videos in QuickTime
- Happens with or without Speck shell
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Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM
A Macbook Pro fan should always be on. However it should not be excessively noisy or running at a high speed all the time. If it is running at maximum RPM (usually about 6000 on a Macbook Pro), this indicates there is software running on your Mac that is stressing the CPU or GPU.
Open Activity Monitor to see which apps are using the most CPU. You can also see which apps are using the most energy as well. Apps like Photoshop, Final Cut Pro, and VMware Fusion/Parallels tend to cause the fans to speed up, as the temperature of your CPU/GPU will increase when using those apps.
Disable Flash in your browser. Flash is now disabled by default in Firefox. In Chrome, you can use Flashcontrol to disable instances of Flash (it still allows you to view Flash on a per-site basis as needed). It’s one of the biggest causes of CPU/GPU stress, and will no doubt increase your Macbook Pro fan speed because Flash is so intensive on hardware.
Restart your Macbook Pro. If the fan is continually running at a high speed, try a Restart.
If a restart doesn’t work, try resetting the SMC and PRAM. The SMC reset especially may help.
There may be others who keep many tabs open, but I have not found anyone like me who has 700+ tabs open. I repeat seven hundred tabs in words, to make my readers know that it is not a typo. While having that many tabs open is not a good idea, but these tabs really start impacting only if you visit them and they get refreshed. Otherwise, the supposedly smart browser programming keeps their energy sucking to a low level. The solution that I have tried and works without failing a single time is shutting down my browser and then restarting, this time making sure that even if I have 700+ tabs open, I visit and refresh them only if necessary. So do not try to visit your tabs on random, say for example, if you are trying to find a specific tab, and you keep going through half of them sequentially, you end up making the fan angry. :)
This doesn’t just happen when I’m doing any kind of heavy activity, it happens as soon as I turn on my laptop. And it’s constant. This is a new problem, it’s only been happening for about a month, I’ve had this machine for about three years.
Scott have you tried turning on your activity monitor? Open that up and then look at what is drawing the heavy load on your CPU. You have the option of closing the activity down. That will show on the scrolling digital readout of CPU use. Good luck.
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