The In-Line Digital Thermal Sensor HDD Upgrade Cable from OWC (Other World Computing) is a plug-and-play temperature sensing cable designed to connect a third-party SATA drive to your 27" iMac 2012 or later system. This device is designed specifically for the iMac, requires no software hacks, and ensures compatibility with Apple's built-in diagnostic processes. Please note that this item does not include installation tools.