Used OWC In-line Digital Thermal Sensor for iMac 2011 21″ & 27″
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.
Part numbers: OWCDIDIMACHDD11, 794504333350
Apple iMac 21″ Mid 2011
Apple iMac 27″ Mid 2011