NGFF M.2 NVME SSD Convert CardInterface: M.2 NGFFApply to: AHCI Protocol 2280 PCIe x4 M.2 NGFFA1465 A1466 A1502 A1398M.2: M KeyCompatible with: 2013 2014 2015 Air Prothe reasons for not recognizing the disk are summarized as follows:1. The card adapter is not inserted into the socket of the SSD computer.2, the hard drive is wrong, some use the NGFF M.2 protocol SATA hard drive to install, pls help to check your hard disk protocol and send a photo to us.3, the system installation disk should use version 10.13.6 or higher GPT (GUID) partition .5, pls do not install the system from , do not try to use your original backup to the system, because the old and new versions of the system disk is not the same. Download the system, make a 10.13.6 disk system installation, install from USB disk.1. Support Following M.2 (NGFF) PCIE-AHCI SSD: XP941/SM951(MZHPU128HCGM MZHPU256HCGL MZHPU512HCGL) SHPM2280P2 / 240G / 480GThe following NGFF PCIe SSD does not support:SMIE PCIE-NVME/PCIE-NVME PM951 (MZVPV128HDGM MZVPV256HDGL MZVPV512HDGL),and other PCIE-NVMe SSDs.2.please turn off the sleep function of the system after installing the .Colour:GreenMaterial:Metal & PCPackage Contents:1*NGFF M.2 NVME SSD Convert CardOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.