The OWC in-line digital thermal sensor is a temperature sensor cable for the Apple iMac. The in-line digital thermal sensor is suitable for the iMac 2009-2010. It is required for all installed in the main drive bay drives. It maintains the correct system fan control, if one is upgrading late 2009- 2010 iMac models. The iMac HDD upgrade option is certified for the Apple Hardware Test. It addresses issues with firmware incompatibilities with hard drives from third parties.
