You can use the command-line SMCFanControl app (it’s in the app bundle) to lower the fan speed (you can’t do that with the standard UI). I know because I used it when I damaged some sensor changed the HD to an SSD in a Mac mini and the fan were always at full speed, so I built a python script using the command line version to change the fan speed based only the CPU temp (not exactly a sane thing to do, but the machine is still working, so not _so_ crazy, surely better than full speed fans all the time)
> Il giorno 6 lug 2023, alle ore 08:40, Richard L. Hamilton <[email protected]> > ha scritto: > > Intel Macs have something called the SMC (System Management Chip, or > something like that) which among other things, monitors all the temperature > sensors and manages the fan speed. > > There are apps (on macOS) that can tweak the fan speed. SMCfanControl is > one, Macs Fan Control is another; there may be others still. A decent such > app will allow you to raise the fan speed above what the system would have > picked, but never set it lower, to ensure that at least the builtin cooling > specs are met. If you're going to do a parallel compile or something else > that maxes your CPU, setting the fan speed to max before that starts will > likely let you run a bit faster longer before getting throttled to control > the temperature. > > On Linux, if you google for > > mac linux smc fan > > you should see some alternatives. I've never run Linux on bare metal on a Mac > (in a VM, yes), so I've never had any reason to try any of those, let alone > recommend any particular one. > >> On Jul 6, 2023, at 00:25, James <[email protected]> wrote: >> >> I've been a long time macports user. >> >> My mid 2011 iMac27 is pegged at High Sierra. I can't build recent mythtv and >> other woes, after a fail flirt with opencore I installed linux. >> >> I asked on the various user forums, but got only well intentioned naive >> answers. >> >> Is fan control done by hardware? >> >> If so why: https://github.com/Hipuranyhou/macfand >> >> I did a faily heavy shotcut render. At the point I chickened out cpu fan was >> at minimum (1200 rpm) and core were at 55C >> >> Do I need to do sw control of the fans? (Chickened out means I dialed the >> fans to FSD and temp came down to 40C) >> >> James >> >> >
