So I'm having an issue with USB 3.0 Specs: MacPro5.1 OSX 10.9.5 Intel Xeon W3690 Hex 3x8GB (24GB) 1333 RAM EVGA 4GB GTX 680 FTW (flashed) 802.11ac & Bluetooth 4.0 (MacVidCards upgrade) PCIe Cards: Lacie USB 3.0 Apricorn Velocity Solo x2 + 1TB EVO 840 RocketRaid 622 eStata Other Hardware: Lexar Professional Workflow HR1 Four-Bay USB 3.0 Reader Hub 4x CFR1 CompactFlash Readers In order to get the Lacie PCIe card to work with non-Lacie peripherals, I had to use a custom driver that someone modified. I installed the driver months ago, so I unfortunately forget where I got it from. My USB 3.0 device functions fine, I even get great transfer speeds but as soon as I plug in the device my mouse becomes very sluggish and skips around, making basic operations a pain in the butt. I transfer the date and then unmount the device at which point things go back to normal. I get the following Kernel as soon as I plug in the reader. It's the only USB 3.0 device I own, so I can't test other stuff. Perhaps I should buy a 3.0 thumb drive and see. Any help with this would be greatly appreciated! Thanks for your time.