Features: This M.2 PCIe NVMe SSD converter adapter allows upgrading the SSD in MacBook models from 2013 to 2015 with a high-capacity NVMe SSD. Compatible with MacBook Air 11” A1465 and MacBook Air 13” A1466 (Mid 2013–2017), MacBook Pro (Retina) 13" A1502 and 15" A1398 (Late 2013–Mid 2015), and Mac Pro ME253 MD878. Requires macOS 10.13 High Sierra or later; not compatible with versions earlier than macOS 10.13. Users must upgrade their operating system using the original SSD before installation. Supports M.2 NVMe/AHCI SSDs such as 960 EVO, 970 EVO/PRO (does not support 960 EVO Plus), WD Black, Crucial P1, HP EX920, ADATA SX8200, Intel 600p series NVMe SSD, and similar models. Does not support internet recovery; a bootable USB drive must be prepared prior to installation (the M.2 PCIe adapter does not contain an operating system and must be formatted first). How to use: 1. Install High Sierra on your old 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 both the adapter and new SSD are securely seated. 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 M.2 SSD and install macOS. Notice: 1. Some NVMe SSD brands may cause issues with macOS hibernation mode. It may be necessary to fully shut down the laptop 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 SSD before use; internet recovery is not supported. 3. If the NVMe SSD is not detected, ensure all steps were followed correctly and attempt reinstallation. Package includes: 1 x Adapter Card 1 x Screw Set & Driver