Package included:1*NVMe SSD Adapter2*screw driver Description:Limited by the thickness of the A1708 notebook, this riser card only supports the Key M NVME SSD with 2230 2240 length single-sided chip particles.in theory, as long as it is 2230 or 2242 length M.2 of the NVME protocol all can be used。(Note, don’t use an SSD with a chip on both sides, just a chip on one side.)✔1. This adapter is only suitable for macbook pro A1708 model✔2.Only Supports 2230/2242 type key M nvme M.2 SSD, does not supports SATA bus key B/B+M SSD✔3. No soft driver required✔4. No additional power required①This adapter card only supports the installation of Mac OS Mojave, Catalina or later Apple systems, and does not support the installation of systems lower than 10.14, because the nvme driver integrated in the lower version of the system cannot recognize most nvme SSD .②Before replacing the new NVME M.2 SSD, please make sure to upgrade from the original computer hard drive to Sierra version 10.14 (or 10.14 or higher) (before replacing the hard drive, your computer must be running 10.14 or higher) once), The SMC and boot ROM versions of Mac will be updated during the upgrade process to support NVME SSD.Note use is as following：1,delete your new M.2 SSD(nvme)all partitions2,Convert partition table of your new M.2 SSD to GUID format on another windows by the Partitioning tool(etc, diskgenius)3,install your new M.2 SSD to A1708 adapter(DONGLIN 109150/109151/109152)4,install the succedaneum(A1708) To your mac book. warning:unplug the battery cord5,hold "Command+R" and power on your macbook,Perform system online recovery