Features: 1.Requires for OS X 10.13 High Sierra or later, not compatible with versions prior to for OS X 10.13. Before installation, you need to use the original SSD to upgrade for OS X 2.Compatible with for OS X Air 11?inch A1465 and for OS X Air 13?inch A1466 (2013?2017 Mid), for OS X Pro 13?inch A1502 and 15?inch A1398 (late 2013?mid 2015), for OS X ME253 MD878 3.This NVME SSD conversion adapter uses a DIY kit for assembling an upgraded version of the SSD replacement, equipped with a large-capacity NVME SSD 4.Adopts M-Key M.2 NVME input interface, does not support SATA M.2 protocol 5.SSD adapter card have stable transmission, excellent performance and long service life specification:Item Type: SSD Adapter Card Input Interface: M-Key M.2 NVME (does not support SATA M.2 protocol) The Following Machine Models Can Be Installed: 2013 For OS X Pro A1398 A1502 (ME864 ME865 ME866 ME293 ME294), 2014 for OS X Pro A1502 A1398 (MGX72 MGX82 MGX92 MGXA2 MGXC2), 2015 for OS X Pro A1502 A1398 (MF839 MF840 MF841 MJLQ2 MJLT2 MJLU2), 2013-2014 for OS X Air A1465 A1466 (MD711 MD712 MD760 MD761), 2015 for OS X Air A1465 A1466(MJVM2 MJVP2 MJVE2 MJVG2 MMGF2 MMGG2), 2017 for OS X Air A1466(MQD32 MQD42 MQD52, Model A1466 EMC3178), 2017 for OS X Pro ME253 MD878, for OS X A1419 (late 2013 and later machines). PackageList:1 x SSD Adapter Card Note1. Insert the adapter card into the SSD slot of the computer, and insert the end of the adapter card with a little force. 2. Installation error of M.2 NGFF hard drive using SATA protocol. 3. The system installation disk must use version 10.14 or higher. The old version of the system does not include the NVME driver. 4. If the hard disk partition format is wrong and cannot be recognized when the system is installed, it must have the GPT (GUID) partition format. Be careful not to use any partition software of the for Windows system to partition the hard disk or partition the hard disk through the PE system, otherwise it will bring trouble to the future installation work. You can use for Linux software (such as the for Ubuntu installation disk) to partition the hard disk. 5. Do not install the system from the network, and do not try to use the original backup to restore the system, because the old and new versions of the for OS X system disk format are different. Please download for OS X system, do 10.13.6 for OS X system installation disk, and install from USB disk.