Operating System Requirements: Windows 10 (64-bit) Even though this FireWire Driver is described as Windows 8, it also works for Windows 10. Make sure the Echo 15+ Dock is directly connected to your computer. FireWire will not function properly if the Dock is down a daisy chain.
Yes, the DVD must be connected to the connector that is the USB 3-to-SATA bridge for full compatibility with macOS. It's the SATA connector closest to the front, which is the connector closest to the 4-pin molex power connector.