GAMERKING A1708 - 256GB M.2

Please Double Check Before Purchasing Compatibility: MacBook Pro Retina 13": 2016 (Two Thunderbolt 3 Ports) A1708 emc 2978; 2017 (Two Thunderbolt 3 Ports) A1708 emc 3164; IMPORTANT NOTICE: Before removal, Back up your original data to USB drive/Portable SSD; and Upgrade your Mac to mac OS 10.13 or Later version. If not, the new SSD will not be recognized after replacement.If your mac does not recognize the drive, then back to the step. Why should update OS version before removing the old SSD? 1.The macOS 10.13 version include an EFI firmware update on the motherboard to recognize PCIe 3.0 NVMe SSD. 2.The macOS 10.12 Sierra, Mac OS X or older versions' EFI firmware just only can get original PCIe 2.0 AHCI SSD to work. 3.Firmware version will change as system updates, will stay on motherboard even if SSD is taken off. 3 Ways Reinstall MacOS: 1. From Time Machine Backup 2. Make USB Installer 3. From Internet Recovery. You can download and check the detailed installation manual shown on the product detailed page. If there is any issue, please feel free to contact us. Thanks.