This M.2 PCIe nVME SSD convert adapter allows to upgrade SSD for 2013-2015 with large capacity NVME SSD. It is compatible with Air 11 inch A1465 & Air 13 inch A1466 (Mid 2013-2017), Pro (Retina) 13 inch A1502 & 15 inch A1398 (Late 2013 - Mid 2015), Pro ME253 MD878. Requires macOS 10.13 High or Later; DO NOT compatible with earlier than macOS 10.13 versions. Please use your SSD to upgrades your macOS before installation. Support M.2 NVME/AHCI SSD such as 960 , 970 /PRO (Not support 960 Plus), Black, Crucial P1, EX920, for SX8200, 600p series NVME SSD and so on. It can't support recovering from internet, important to prepare bootable USB disk driver(M.2 PCIe has no OS inside,it must be erased first). Type:Cable Adapter How to use: 1. Make sure to install the High 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 Installer on a bootable USB stick. 4. Open the and disconnect the battery while switching out and make sure both adapter and new SSD sit snug. 5. Reconnect the battery before closing the shell. 6. Insert the Installer USB stick from , and 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 OS. Notice: 1. You are kindly that macOS failed on resume from hibernating with some NVME SSDs of some . Have to turn off laptop all the time instead of close the lid and go. 2. Please insert our adapter fully into SSD slot and you must prepare bootable USB disk(see third point) with High to format M.2 SSD first, it can't support recover from internet. 3. There are many customers can use it, so we suggest you to try it again if your can't detect nVME SSD. colour:black Material:PCB Size:25*90mm Package Contents: 1 * Adapter card 1* screw set & driver