I upgraded my old MacPro1,1 to run Yosemite, but my old Dynex Esata card was needing drivers re-installed. Here are the drivers that worked for me. The drivers on the Dynex website didn’t work.   As soon as I installed these drivers, the drives were recognized, no restart necessary. SiI3132_1.2.5.0_Sil_Pkg 2-Port eSATA II PCI Express Adapter