Features: This M.2 PCIe NVMe SSD adapter allows upgrading the SSD in MacBook models from 2013 to 2015 with a high-capacity NVMe SSD. It is compatible with MacBook Air 11 A1465 and MacBook Air 13 A1466 (Mid 20132017), MacBook Pro (Retina) 13" A1502 and 15" A1398 (Late 2013Mid 2015), and Mac Pro ME253 and MD878. Requires macOS 10.13 High Sierra or later. Not compatible with versions earlier than macOS 10.13. Please update your operating system using the original SSD before installation. Supports M.2 NVMe/AHCI SSDs such as Samsung 960 EVO, Samsung 970 EVO/PRO (does not support 960 EVO Plus), WD Black, Crucial P1, HP EX920, ADATA SX8200, Intel 600p series NVMe SSD, and others. Does not support internet recovery. It is essential to prepare a bootable USB drive (the M.2 PCIe adapter does not include an operating system and must be formatted first). How to use: 1. Install High Sierra on your original drive to ensure the firmware supports NVMe. 2. Perform a full backup of your old drive using Time Machine. 3. Create a High Sierra installer on a bootable USB drive. 4. Open the MacBook, disconnect the battery, replace the drive, and ensure the adapter and new SSD are securely installed. 5. Reconnect the battery before closing the case. 6. Insert the bootable USB installer and press the Option key during startup. 7. After booting from the USB, use Disk Utility to format the new SSD and install macOS. Notice: 1. macOS may fail to resume from hibernation with certain NVMe SSD brands. It is recommended to shut down the laptop completely instead of closing the lid. 2. Fully insert the adapter into the SSD slot and use a bootable USB drive with High Sierra to format the M.2 SSD. Internet recovery is not supported. 3. Many customers have successfully used this adapter. If the NVMe SSD is not detected, try reseating the components and repeat the setup process. Package includes: 1 x Adapter Card 1 x Screw Set & Driver