SEENIGHT&reg; Hard Drive Cable w/ IR Sensor for MacBook Pro 13" Unibody A1278 2011 - 821-1226-A,922-9771 Product Condition:New OEM Part Number: 922-9771 , 821-1226-A Compatible Model : MacBook Pro 13" A1278 2011 Compatible Subfamily : MacBook Pro "Core i5" 2.3 13" Early 2011 MacBook Pro "Core i5" 2.4 13" Late 2011 MacBook Pro "Core i7" 2.7 13" Early 2011 MacBook Pro "Core i7" 2.8 13" Late 2011 Compatible LAPTOP No : MD314LL/A, MC724LL/A, MD313LL/A, MC700LL/A MacBook Pro Unibody: MacBook Pro (13-inch, Early 2011), MacBook Pro (13-inch, Late 2011), MacBook Pro (13-inch, Mid 2012) Compatible Model No:MB990LL/A, MB991LL/A MC374LL/A, MC375LL/A MC700LL/A, MC724LL/A