Question about Fanspeed

[sebastian-h]

Hello there! First off, great tool, works quite well!

I have a question about following code snippet:

osx-cpu-temp/smc.c

Line 275 in af036f7

float rpm = actual_speed - minimum_speed;

What is it supposed to do? I ask because a few lines further up in that method you have read from SMCGetFanRPM(key) into local variables for minimum, maximum and actual (fan)speeds. I seem to find the variable actual_speed seems to be quite plausible on my machine, so i was wondering what your line of thought might be?

I am using a Macmini3,1 (thats a late 2009 mac mini, i think) on OS X El Capitan 10.11.6 and it is reporting "Fan 0 - Master at 318 RPM (8%)", which seems a little low. The actual_speed variable is reading 1818, which seems quite plausible.