Transcend 64GB JetDrive Lite 350 Storage Expansion Card for 15-Inch MacBook Pro with Retina Display (TS64GJDL350) 64GB (MLC) Storage Expansion Card for MacBook Max Read: 95MB/s, Max Write: 60MB/s For MacBook Pro with Retina display 15" (Mid 2012 - Early 2013) Compatibility with Mac OS X 10.11 El Capitan is currently under verification New Update JetDrive Toolbox (v1.14.3)