I have a mid-2012 Mac Pro running a Cubix GPU expander. My main purpose is for Da Vinci Resolve Color Correction. I have upgraded to OSX 10.9.4 Mavericks and installed the following drivers: CUDA Driver : 6.0.51 GPU Driver Version" 8.27.26 (334.01.02f02) I have power to the Titans via both power ports on each card as they require a decent amount and they are lit up and fans spinning. When I install Da Vinci 11, I get the CUDA not detected Error. I have the Web driver selected in the upper right hand screen. Any thoughts on how to make Da Vinci utilize the Titan Blacks? Thanks ahead of time.