I have one of the first Mac Pros from 2006, and I want to move my OS to an SSD to increase performance. I have all of the SATA bays full with large spinning disks, so my plan was to install an SSD in a PCI adapter card. Here is my set-up: Mac Pro 1,1 (2006), running Mac OS X 10.7.5 Lycom DT-120 PCI adapter for M.2 key SSDs, installed in PCI slot 3 Samsung SM951 512 GB SSD installed on Lycom card When I boot the Mac, the SSD does not appear in Disk Utility, and the PCI section in the System Information app shows “There was an error while gathering PCI card information.” For what it’s worth, the Expansion Slot Utility sees the Lycom card, as evidenced by this screenshot. Does anyone have any ideas what the problem might be, or suggestions for troubleshooting/fixing it? Thanks in advance.