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
Somewhere there was a question “where can I find temperature and fan speed”..
There are some nice tools, but this seems the easiest way for me.
Just run the command in terminal shell:
be aware that this command requires admin privileges. So if you are logged in and your account has admin privs you are asked to enter your login password. ..
Also notice that the program does not end. So in order to do so you have to close the terminal window or <ctl>C ..
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.
I closed a ton of Google Chrome tabs and it calmed down. It woke me up in the middle of the night sounding like it was trying to take flight!
I cleared my history and it immediately turned off
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.
I have the same problem with the fan on for a long time with no apparent reason. My MacBook Pro is 4.5 years. I checked the Activity Monitor and there was no excessive activities from running program. When I upgraded my Mac and have to transfer data from the old MacBook Pro to a new one, the IT tech told me the battery in the old MacBook was buckled and the trackpad was leveled with the body of MacBook. The IT tech told it to an Apple Store to get a quote to replace the battery. I was told the battery was at the early stage of “melting” and glued to the bracket inside. I have to replace the entire battery and bracket and will cost around $500. I was also told that I was carrying a potential fire hazard ……..
I have to say mine has been doing it too. I have a MacBook Pro (15-inch, Mid 2012).
I didn’t notice it until sometime last year with OS upgrade. I also somehow lost my rights to my permissions and when I use terminal I get error messages installing node, npm and homebrew. It is so frustrating. I will get Visual Studio Code going, have my class running in a browser and terminal open and it sounds like my computer is going to get up and fly away the fan is so loud.
I have reinstalled the operating system. The fan is still running loud and my MacBook is now getting hot to touch. Its my favorite. I like the older version much more than the newer ones. I like have my optical drive and didn’t want to upgrade to have to lose that.
I will say talking with my friends in class that Google Chrome pulls a lot. You can see it on activity monitor. I switched to Brave at her suggestion and that does hold the fan off a lot longer.
There is so much more running behind Google’s browsers than we know. I’m going to try resetting the SMC and PRAM and let you know. I’m wondering if its the battery like the one guy stated. I run diagnostics and nothing comes up saying it is wrong.
For me it was because OneDrive app was using a lot of energy so I quit and uninstalled it. Open your activity monitor and see what is using the most energy on your mac, stopping the app might solve the problem.