The connection which takes the power from the Host, the computer, also transfers the data, So id you connect from the small usb connector to the Mac, your conection will work, and midi data will be transferred,
I Think Sylbench is only meant to check your setting of the CC in the Sylphio, least how i Use it.
The host connector is intended to connect a USB device, like a keyboard. Never used that.
sorry i did not see your question before