1.This riser card supports the 2280 PCIE x4 and PCIE x2 protocol M.2 NGFF SSD solid state drive converted to the 2013 2014 2015 version of the Apple MacBook AIR and PRO A1465 A1466 A1502 A1398 model hard drive. 2.PCIE x4 and x2 M.2 NGFF SSD are divided into AHCI protocol and NVMe protocol. For rookie level buyers, please use PCIe x2 or x4 AHCI hard disk. Experienced and capable buyers can use NVME protocol PCIe x4 M. 2 NGFF SSD installation. 3.The type of hard disk used is related to the use of Samsung 970evo, HP EX900 920 950, SanDisk extreme Pro M.2 NGFF and Lexar's NM600 will not appear to wake up the crash, so I suggest you choose these hard drives as much as possible. 4.Rookie buyers are advised to purchase PCIe x4 or PCIe x2 M.2 NGFF AHCI SSD with this adapter card! Because the disk installation system of the AHCI protocol is relatively less restrictive, note that the AHCI data transfer protocol is not a SATA data transfer protocol. In particular, not all NVMe M.2 NGFF SSD Apple computers are compatible!