

NVM Express (NVMe) M.2 solid state drives are now working in OS X with a new driver by JimJ at macvidcards. Great news for those who want to use the same types of super fast solid state drives that Apple uses. For Sierra and earlier macOS, see RehabMan's HackrNVMeFamily co-existence with IONVMeFamily using class-code spoof as his driver will allow NVMe SSDs to be used as boot drives. Additionally, Apple's High Sierra now natively supports NVMe SSDs. It will not work in Sierra or High Sierra.

Update: This thread is now obsolete as JimJ, the author of the below mentioned NVMe driver, no longer supports his driver which has not worked since El Captian (then, only as a non boot drive).

So, no problem, right, as the 4.0 cards are backwards compatible. (RTFM, I hadn't noticed that the 2nd slot eliminates a PCIe I was using for my 10Gb NIC, my bad), but they are PCIe 3.0. The PM9A1 is being sold here with a very low price differential over a 970 EVO, and a lot cheaper than a 980 Pro, so I decided to get it. One of the components I needed now is a 2TB M2 NVME. I'm planning to build a new rig next year as soon as the price of certain components go down.
