Hi, Yesterday I did install my new Lycom DT-120 with its SM951 512GB (NVMe) M.2 PCIe. I've to admit, it's fast! Moving from a SSD SATA II to a PCIe SSD it is a different world! With the raise of the SSD it change my way of working but in the meantime the size of the files just boom! After working/testing with a RAM disk to improve my way of working with all the pros and cons, I found the best of the two worlds! Secure and efficient! Here is how i did proceed to install my card and the SSD on my MacPro running over El Capitan. my SIP was already deactivated, before anything I suggest you to deactivate the SIP if you are going to do the same Install your card on the Slot 3 or 4 of your MacPro Download the NVMe driver here Copy the kext file NVMeGeneric.kext into /Library/Extensions cmd + i on the Extensions folder and update the permission by clicking on "apply to enclosed items" Reboot my computer Open the terminal and enter the following command line: " sudo kextload /Library/Extensions/NVMeGeneric.kext" A popup window should appear asking you to reinitialise the new detected support. Do it Happy! You can reactivate SIP after Bench However, the system information software doesn't seems to recognise the PCI card or the NVMe support. When I click on NVMEExpress tab i have this message This computer doesn't contain any NVMExpress devices. If you installed NVMExpress devices, make sure they are connected properly and powered on. PCI tab There was an error while gathering PCI device information. Do you know why? is it a limitation of El capitan? Other quick question because I don't find the answer. How can I activate the TRIM and where can I see the TRIM support confirmation? The SSD is displayed as an external support which is strange with Disk utility. Thanks!