OWC In-Line Digital Thermal Sensor HDD Upgrade Cable Kit iMac 2009-2010

In-Line Digital Thermal Sensor Cable

This OWC cable kit enables a third-party SATA drive to function correctly in the main drive bay of a 2009 or 2010 iMac. It provides the hardware thermal sensor required by the System Management Controller. The kit includes the sensor cable and installation tools such as suction cups and Torx drivers. It is engineered specifically for these iMac models to maintain proper fan control.

Practical Limits of the SATA Interface

The SATA interface on these iMacs expects a proprietary thermal signal from the original drive. Without this in-line sensor, the System Management Controller cannot read drive temperature and spins fans at maximum speed continuously. The cable bridges this gap for any standard SATA drive installed in the primary bay. It does not add features absent from the host SATA controller or alter the native data transfer rate.

Apple Hardware Test Certification

This is the only upgrade cable certified to pass the Apple Hardware Test on compatible iMacs. Certification confirms the sensor communicates correctly with the onboard diagnostics, preventing false hardware errors. Buyers who need the internal drive to report temperature through official Apple diagnostics require this specific certified solution. Builders using external storage or the optical drive bay do not need this internal sensor cable.