[SSD for MacBook Upgrade]: Replace the SSD to increase the capacity and processing speed up to 2150MB/s. Perfectly compatible with MacBook Pro A1708, 2016 EMC 2978, 2017 EMC 3164. Note,Just Non-Touch Bar Models Supported. Model & EMC needs both match, or it will not work. [IMPORTANT NOTE] Before removal, Back up your original data to USB drive; and Updated your old original SSD to mac OS 10.13 High Sierra or Later version. If not, the new SSD will not be recognized after replacement. [Pre-installed MacOS Catalina] For a better experience, we pre-installed macOS system for customers. Because many customers Do not how to install the systems after receiving the SSD. For better compatibility, we pre-installed 10.15 Catalina system. If you want a higher system, you can go to the Apple Store to upgrade it. [High Speed & Safety] With Jorkar PCIe NVMe SSD, greatly upgrade your Macbook 2016-2017, read speed is up to 2150 MB/s, write speed 1650 MB/s (1TB). Faster boot times, faster application loading times and better system responsiveness. With the Encryption program, protect your data safely. [5 Years Warranty] We provide 5 Years warranty and lifetime tech support, if there are any problems with the Macbook SSD drive, please contact us freely and we will give you a satisfied solution. Jorkar Macbook SSD is Safer & Faster for your macbook upgrade!