Also, if it can work, I am unsure what should be the path of each fan to put in that file and whre I could find an example of settings file. But I am not sure this can work, because maybe fancontrol can only control PWM fans and somehow imac fans are not PWM. So I could simply make this settings file myself and set up a min speed of 200 RPM for the CPU fan. Pwmconfig is "just" a helper to create the fancontrol settings file. I also tried to install mbpfan: But it is meant for macbooks and not for imacs, with the result that only one sensor seems to be taken into account, then all fan speed are raised simultaneously, which is not helping in my case (see ) What I think could work but not sure how I tried to follow the steps described here: How to control fan speed?, so basically set up lm-sensors, then set up fancontrol with the help of pwmconfig But pwmconfig answers: There are no pwm-capable sensor modules installed Even after adding the module applesmc to /etc/modules and rebooting, no chance. This is annoying because I think with a fix speed set to 2000 RPM for example, the temp would stabilise at an acceptable temperature, hopefully below 90☌, while the noise would still be acceptable. This do lower the temp of these 2 sensors, until aournd 80☌, but this is not cool enough to reduce the fan speed. This fan gradually accelerate until its max, 3600 RPM, which makes the imac very loud. Here is a screenshot of psensor: psensor screenshotīasically, 2 sensors, TD0D and temp1 see an increase in temperature until reaching 105☌, which triggers the increase of the CPU fan speed. While it runs smoothly for all I need to do, 20 minutes after starting the CPU fan starts to get super loud. You will need to contact an Apple repair specialist who can safely open your Mac and replace the broken sensors and clean out any dust inside.I switched an old Imac (2008) to Lubuntu. Then power on whilst holding these buttons: control+option+shift+power on Talk to a Apple Repair Specialist Do this by first turning off your Mac and unplugging it for 15 seconds. The first port of call is to do a SMC reset. If none of these tips have worked, chances are you have a problem with a heat sensor in your Mac. ![]() ![]() If they same air is being dragged through your iMac over and over again it will gradually rise causing your fans to work harder trying to cool off your Mac. If you’ve got your iMac in an alcove or on a closed shelf, try moving it out into the open so it can circulate the warm air out and cold air in. Checking on the problematic apps to see if they have any new updates available is also a good shout. To see if you’ve got a process or app that’s causing the fans to kick up, first go to the magnifying glass in the top right of your screen and search ‘activity monitor’ open it and click the CPU tab and in the CPU% column you will get a read out of all the apps and processes being carried out by your iMac and the amount of computing power they’re using.įrom thing you will be able to distinguish if you need to run certain programs individually with other apps closed and so on. This could be down to blockages in the fan outlet channels, broken heat sensors inside your iMac or software processes causing a lot of strain on the hardware. If your desktop iMac is making a lot of fan noise, something is causing your computer to get really hot.
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