Blazingly fast – much faster than regular Mac SSD’s! NOW ALSO AVAILABLE WITH LATEST MAC OS BIG SUR and CATALINA OPTIONs. What you’ll get is a Mac compatible SSD including. (1) Brand new 2TB 3D NAND NVMe M. 2 with MacOS High Sierra pre-installed. Please message for other OS options, High Sierra is sent by default. For other OS options, your current installed OS must match or it will not work. In your message, please confirm the current / last installed OS and we can match that. 2 NVMe adaptor card for Mac. The installation process is easy, simply swap the SSD. Upgrade to macOS high sierra or Catalina or Mojave first, otherwise, the new SSD won’t work. Power off your Mac, remove all the screws on the back cover. Carefully remove the stock SSD. Install the new SSD Kit. Put on the back cover and all the screws. Power on your Mac, you probably won’t hear or see anything during the initial one or two minutes. To restore from a Time Machine backup, follow these steps. Back up your old SSD using Time Machine. Power on your computer while holding down the option key, choose Time Machine drive. Restore the Time Machine backup to the new SSD. This solution is faster than Apple stock SSD. This product only supports 2013, 2014, 2015, 2016, 2017, 2018 Apple MacBook Air, MacBook Pro, Mac Pro. MacBook Air Mid 2013 and newer. MacBook Pro Retina Late 2013 and newer. Mac Pro 2013 and newer. Note: Brand new items. Doesn’t come with the original box.