



Aside of this daemon, SSD Fan Control features a user-friendly application for monitoring and control. Whenever the SMC system resets to its default, SSD Fan Control takes over again to make sure that your system remains quiet. The core of the system is a daemon that runs in the background and takes care of the fan management. It enables you to overrule the automatic fan control and manually configure the fan speed. In both cases the SMC system tends to go into frenzy and drive you mad with a loud fan. Then you can set the fan speed according to the slider. Next, you'll need to flick the switch in the middle left of the card. To do this, click the button in the top right corner of a fan control card and check the option Manual control. The first method is to set a constant speed. Sometimes reusing the external sensor is not possible or, as in more recent generations of iMacs, replacing the original hard disk breaks the system’s temperature monitoring. There are two options for adjusting fan speed in Fan Control. The SMC collects data from external sensors or by reading the internal hard disk temperature in a proprietary manner. Fan management in Apple systems relies on temperatures reported by the SMC system. IMac users who tweak their systems using 3rd party hard disks or solid state disks, are often surprised by an unpleasant aftermath: an annoyingly noisy hard disk fan.
