Willhom (922-9063, 922-9525, 922-9773) Replacement Kit Trackpad with Cable for MacBook Pro 13&rdquo; A1278 (2009, 2010, 2011, 2012) Unique100% New , Trackpad + Cable included. Compatibility for MacBook Pro 13" Unibody A1278 (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012) Function Seamlessly works just like your old trackpad . Smooth easy scrolling , Three- and Four-finger swipe , Double tap Reliable, easy clicking Identifying NumbersPPN: 821-0831-A, 821-1254-A , APN:922-9063, 922-9525, 922-9773 EMC Number2326 , 2351 , 2419 , 2555 , 2554 For MacBookPro5,5 Mid 2009: MB990LL/A (2.26 GHz Core 2 Duo) For MacBookPro5,5 Mid 2009: MB991LL/A (2.53 GHz Core 2 Duo) For MacBookPro7,1 Mid 2010: MC374LL/A (2.4 GHz Core 2 Duo) For MacBookPro7,1 Mid 2010: MC375LL/A (2.66 GHz Core 2 Duo) For MacBookPro8,1 Early 2011: MC700LL/A (2.3 GHz Core i5) For MacBookPro8,1 Early 2011: MC724LL/A (2.7 GHz Core i7) For MacBookPro8,1 Late 2011: MD313LL/A (2.4 GHz Core i5) For MacBookPro8,1 Late 2011: MD314LL/A (2.8 GHz Core i7) For MacBookPro9,2 Mid 2012: MD101LL/A (2.5 GHz Core i5) For MacBookPro9,2 Mid 2012: MD102LL/A (2.9 GHz Core i7) Smooth easy scrolling Three- and Four-finger swipe Double tap Reliable, easy clicking Next, reinstall the four 1.2 mm Phillips screws along the inner edge of the trackpad. Tighten the screws all the way, then back them out about 1/4 turn. Check the alignment of the trackpad on the keyboard side of the upper case. Once you have centered the trackpad in the upper case, tighten the four Phillips screws all the way.