HI friends, reviving this ancient thread because i have a yamaha p80 (20+ years old! !!!) that i am FINALLY getting around to attempting to connect up to my macbook pro (17-in, early 2011, running OS X 10.11.6).
based on the comments in this thread, i tried buying a "Yamaha UX16 USB-Midi Interface" since "ciraklizer" confirmed they were able to get this sort of a setup running with it, and i figured maybe it's more likely to work especially given all the time that's passed, since it's yamaha.
BUT while a lot of places still have it in their inventory listings, it's not actually in stock anywhere, and the one place that i was able to place an order with, cancelled the order bc it's "backordered indefinitely" (aside, if this just means "not in production anymore", why couldn't they just say???)
SO, i'm wondering: Jego, were you able to get this setup to work with your "U2MIDI USB Cable-Like Interface"?
and nocturne, you were the one who finally figured out how to make this kind of a set up work:
Take the Midi plug with "Out" embossed in the plastic. Plug it into the Midi socket labeled "In" on your digital instrument. The "In" plug goes into the "Out" socket. Don't ask me why: just do it.
what MIDI interface did you use? there seem to be a lot of options out there and i don't want to waste my time / money buying something that doesn't work with the somewhat ancient equipment i have (and none of the music stores are open for me to call and get buying advice!

)