Features: This M.2 PCIe nVME SSD convert adapter allows to upgrade of SSD for MacBook 2013-2015 with a large capacity NVME SSD. It is compatible with for MacBook Air 11¡± A1465 and for MacBook Air 13¡± A1466 (Mid 2013-2017), for MacBook Pro (Retina) 13" A1502 and 15" A1398 (Late 2013 - Mid 2015), for Mac Pro ME253 MD878. Requires for macOS 10.13 High Sierra or Later DO NOT compatible with earlier than for macOS 10.13 versions. Please use your original SSD to upgrade your macOS before installation. Support M.2 NVME or AHCI SSD such as for Samsung 960 EVO, Samsung 970 EVO or PRO (Not support for 960 EVO Plus), WD Black, Crucial P1, HP EX920, for ADATA SX8200, Intel 600p series NVME SSD and so on. It can't support recovering from the internet, important to prepare a bootable USB disk driver(M.2 PCIe has no OS system inside, it must be erased first). How to use: 1. Make sure to install the High Sierra on your old drive, so that a newer firmware is installed that can handle NVME. 2. For your old driver, please do a full backup via Time Machine. 3. Create a High Sierra Installer on a bootable USB stick. 4. Open the MacBook and disconnect the battery while switching out the drive and make sure both the adapter and new SSD sit snugly. 5. Reconnect the battery before closing the shell. 6. Insert the Installer USB stick from step 2, and press the option key while the machine starts. 7. Finally, once it's up you can now go to the disk utils to format and install the MAC OS. Notice: 1. You are kindly reminded that macOS failed to resume hibernating with some NVME SSDs of some brands. Have to turn off the laptop all the time instead of closing the lid and go. 2. Please insert our adapter fully into the SSD slot and you must prepare a bootable USB disk(see third point) with High Sierra to format M.2 SSD first, it can't support recovery from the internet. 3. There are many customers who can use it, so we suggest you try it again if your MAC can't detect nVME SSD. Package includes: 1 x Adapter Card 1 x Screw Set and Driver