Music Keyboard Midi Usb & Os X Won't Work, how to setup USB midi devices Options

[Zephrane]

my simple music keyboard (midi) does not seem recognized by OS X. The hardware USB (Midisport) is present in Apple system profiler. In Audio Midi Set Up panel, I create the new device but impossible to
connect it. In the Apple Assistance, one is supposed "to draw the
cable" (virtually by a drawing!) between the icon of the peripheral and
I do not know which interface (the Assistance is far from explicit).
Is it a driver missing?
In former OS, we had OMS of Opcode which
unfortunately does not have a recent version OS X.
Is there a "generic" midi driver?