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In order to protect the internal components, the built-in fans kick into overdrive to bring the overall temperature of theВ CPU/GPU/HDDВ down. I blog from the beaches during the summer so my notebook quickly becomes unbearably hot due to the heat from direct sunlight.

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I hope this covers everything.A free macOS app called smcFanControl lets you individually control the fans built into every Mac desktop or notebook in order to make your computer run cooler. Lastly, be sure to run /Applications/smcFanControl.app/Contents/Resources/smc -k F0Md -w 00 after the 'unload' command to reset the fan to its default settings (otherwise it may be stuck at 1000rpm until the next reboot!). Note that the job will not run on the next restart unless you invoke the 'load' command again. That said, you can always stop the job and mark it as disabled by replacing 'load' with 'unload' in the previous command. There is no need to run this command in the future as the job will begin running in the background once you restart the iMac (this is due to the 'RunAtLoad' key being set to 'true' in the above '.plist' file). Run launchctl load -w ~/Library/LaunchAgents/ to start the automatic switching between 'silent mode' (1000rpm) and 'default mode'.

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Also, FULL_PATH_TO_SCRIPT must be the absolute path to the file containing the Python source code (you can easily find this by dragging and dropping the file into Terminal.app). Replace FULL_PATH_TO_PYTHON_INTERPRETER with the output of which python3 (run inside Terminal.app).

Create a file called '' inside '~/Library/LaunchAgents' (the tilde matters!) with the following contents:.Copy the source code of the main script ( ) to your clipboard and then paste it to a new file called 'main.py' (you can pick any other name as long as you include the '.py' extension).It's vital that this application resides in the specified folder since the script relies on the 'smc' command line tool packaged within the app. Click on 'smcfancontrol_2_6.zip' and then move the smcFanControl application to /Applications.

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Download smcFanControl version 2.6 from.

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Then click on the '.pkg' file to install Python 3.8.6 on your machine. Scroll to the bottom of that page and click on 'macOS 64-bit installer' to initiate the download. Here's a step-by-step guide Download Python 3.8.6 (which is the exact version that I'm using) from. I will explain how everything works in a bit. That 'Cheat Engine' felt quite suspicious to me, so I ended up writing my own script which automatically switches between 'default mode' and 'silent mode' according to some rules that I set up. I also created a plist file inside ~/Library/LaunchAgents so that the Python script runs automatically on every startup: I tested this script extensively and have the confidence that it works without any issue (at least for the 2020 T2-enabled iMacs). Line 57 of my script provides a nice quick summary of all previously discussed cases. In that scenario, it doesn't hurt to leave the 'silent mode' and therefore run the fan according to the default settings. In addition, I also took into account the case when the CPU is slightly stressed with a temperature that's just below the higher threshold of 65вњ¬. To be on the safe side, the average computed over the last minute helps ensure that we go back to 1000rpm only if the temperatures have settled below 50вњ¬. However, if there is a quick burst in CPU activity and the temps jump up to 70-80 degrees instantly, then it makes sense to leave the 'silent mode' and simply restore the default fan settings. To account for both a spike in CPU activity and a rather constant but moderate use of CPU, I set up two thresholds: HIGH_TEMP_THRESHOLD (65 degrees Celsius) and LOW_TEMP_THRESHOLD (50 degrees Celsius), respectively.ДЇor example, if the CPU is idling and the temperature is around 40вњ¬ across all CPU cores, then one can safely run the fan in 'silent mode' (1000rpm). Every two seconds the script grabs the current CPU temperature (as an average across all cores) and computes the average CPU temperature over the last minute.

Now, while the code is pretty much self-explanatory, I am going to describe the gist nonetheless. Best to have Python 3.8 installed on your computer, though. I tested it using Python 3.8, but it should in theory work with Python 3.5+. I will explain how everything works in a bit.ДЇirst off, here is the Python script I wrote. Click to expand.That 'Cheat Engine' felt quite suspicious to me, so I ended up writing my own script which automatically switches between 'default mode' and 'silent mode' according to some rules that I set up.