The Apple 922-9877 is a hard drive temperature sensor and power jumper cable assembly designed specifically for iMac A1311 27-inch models (mid-2011 and later). This cable connects the hard drive's thermal sensor to the system logic board while providing power delivery to the drive, enabling proper temperature monitoring and thermal management. The connector configuration supports standard 3.5-inch SATA hard drives installed in the iMac's internal bay. Used in configurations with both standard mechanical drives and Fusion Drive setups, the 922-9877 is critical for preventing thermal throttling and system shutdowns due to unmonitored drive temperatures. Compatible exclusively with A1311 iMac models; not compatible with other iMac generations or external enclosures. This refurbished unit has been tested and guaranteed, available via quote.