Odyson - Hard Drive Cable Replacement for MacBook Pro 13" Unibody A1278 (Early 2011, Late 2011) Hard Drive Cable for MacBook Pro 13" A1278 (Early 2011, Late 2011) Description: Connects SATA 2.5" hard drive to logic board Includes: Hard drive cable + IR sensor/sleep detector Compatibility: MacBookPro8,1 Early 2011 (MC700LL/A, MC724LL/A) Compatibility: MacBookPro8,1 Late 2011 (MD313LL/A, MD314LL/A) Part Number: 821-1226-A, 922-9771 IR sensor for communicating with an Apple remote Plugs into SATA port on the hard drive and connects to the logic board Adhesive strips to make sure everything stays in place Installation is quick Reliable parts that work the first time every time All connections are clean and intact 821-1226-A