Features: Type: PCI-E 4X Converter Adapter Card This product is only applicable to Apple 2013 2014 2015 version of Air, Pro, etc. For the following models: For 2013 Macbook Pro A1493 A1502 MD864 MD865 MD293 Md294 SSD Mac3 Pro 8 ret A1502 ME864 ME865 ME866 ME293 ME294 SSD For 2013 Macbook Air A1465 A1466 MD711 MD712 MD760 MD761 SSD For 2014 Macbook Air A1465 A1466 MD711 MD702 Pro S2 MD712 pro Pro A1502 A1398 MF839 MF840 MF841 MGXA2 MGXC2 SSD For 2015 MacBook Air A1465 A1466 MJVM2 MJVP2 MJVE2 MJVG2 and Macbook Pro ME253 MD878 SSD New SSD is a PCI-e 4x interface. The SSD is connected to the computer through a PCI-E 2.0 X4 or X8 or X16 interface, that is, a PCI-E graphics interface. Before making a purchase, please ensure that your machine does not have this interface, otherwise it cannot be used. Apple's new interface SSD through the computer's PCI-EX4 or X8 or X16 interface adapter, enter the operating system can be correctly identified, the usual computer is not visible in the BIOS, it does not support system startup, unless your computer's motherboard BIOS supports PCI-E device startup. Z77 motherboard with WIN7 or WIN8 system installation disk, installation can be identified, you can partition, but after copying the system file restart, cannot find the hard disk, because the machine's BIOS boot item does not have a PCI-E hard disk option. This is not a riser card problem, because the previous machine's BIOS does not support PCI-E device startup, some servers may support startup. Package List: 1 x PCI-E 4X Converter Adapter Card for Apple MacBook Air Pro SSD