Please Note: The 512GB SSD listed here is specifically for the 15-inch MacBook Pro with Retina display (Mid 2015) and the MacBook Pro must be updated to macOS 10.13.x (High Sierra) or later prior to installation of this drive. With macOS 10.13 (High Sierra), Apple enabled the 15-inch MacBook Pro with Retina display (Mid 2015) to be able to utilize this faster type of NVMe-based SSD. If your MacBook Pro is already running macOS 10.13.x (High Sierra) or later, then you are ready to go. You can verify the model of your MacBook Pro and check which macOS you're running by going to the Apple drop down menu at the upper left of your display and selecting "About This Mac".
The highest performing internal storage upgrade ever created for the MacBook Pro (Retina, 15-inch, Mid 2015): 512GB NVMe Interface, 4 PCIe lanes (x4), 8GT/s and clocking in at 2900MB/s Read and 2100MB/s Write! Your MacBook Pro is a high performing Mac requiring the very highest performance PCIe-based flash drives available today. The MCE 512GB PCIe-based NVMe Flash SSD Upgrade Solution for the 15-inch MacBook Pro with Retina display (Mid 2015) was designed to take advantage of the super-fast 8GT/s PCIe architecture present in that machine. This upgrade includes all the tools necessary to perform the upgrade as well as an illustrated installation and upgrade guide. Everything you need to upgrade your machine is included!
Compatibility
15-inch MacBook Pro with Retina display (Mid 2015) running macOS 10.13.x (High Sierra) or later. Verify your model of MacBook Pro by clicking on the Apple menu (at the upper left of your screen) and then selecting the top item "About This Mac"
Package Contents
MCE 512GB PCIe-based NVMe Flash SSD for 15-inch MacBook Pro with Retina display (Mid 2015), MCE Drive Installation Tool Kit Illustrated Installation and Upgrade Guide