SMAKN&reg; SSD To PCI X4 Adapter for 2013 2014 MacBook Air A1465 Pro A1502 MacBook Air A1466 Pro A1398 MD712 Desktops The computer must have a PCI Express 4x socket,version 2.0 or higher. 2013 and 2014 MacBook Air SSD is both side have contact,one sid is 16+12 pin,the other side is 11+14 pin,size is 89 mm*24 mm.It's PCIe interface. The product only support read data and write data in SSD,don not support as the system startup disk. The product only support 2013&2014 Apple MacBook Pro retina model is A1398 A1502 (ME864 ME865 ME866 ME293 ME294) 2014 Apple MacBook Pro retina model is MGX