Review on 🔌 StarTech.com U.2 to M.2 Adapter – PCIe NVMe SSD Adapter for 1 U.2 Drive – M.2 PCIe x4 Interface – U.2 to M.2 PCIe Adapter – Enhanced U.2 SSD Converter (M2E4SFF8643) by David Flores

Runs macOS Catalina v10.15.6 on a Micron 9300 MAX 6.4 TB U.2 SSD ; iMac (Retina 5K, 27-inch, 2017) Intel Core i5 quad-core @ 3.4 GHz, via: Highpoint RocketStor 6661A Thunderbolt 3 - PCIe 3.0 X16 expansion chassis; StarTech.com U.2 to PCIe to x4 PCIe adapter for 2.5" devices. NVMe U.2 SSD - PCIe Adapter SFF-8639 - U.2 SSD - PCIe SSD - U.2 Drive (PEX4SFF8639). I had to disable System Integrity Protection from the terminal (disable csrutil). Download) On this iMac over a TB3 connection, the drive runs at about 2400 read/writes per BlackMagic Disk Speed Test in hot mode with continuous use, but the speed on a Micron 9300 MAX 6.4TB U.2 SSD remains stable.