'''OWC In-line Digital Thermal Sensor for iMac 2011 Hard Drive Upgrade'''
# Required for any drive installed into the main drive bay.
# Eliminate fan noise and maintain correct system fan control when upgrading your 2011 iMac.
# The only iMac HDD upgrade option on the market certified to pass the Apple Hardware Test.
# Fixes firmware incompatibility issues with third party hard drives.
# https://eshop.macsales.com/item/OWC/DIDIMACHDD11/