Thanks guys, but got it going! I didn't have the BIAB midi prefs set to "core" like I should have...

With my old macbook pro, I can now record midi directly from my guitar plugged straight into the audio input on the mac! No interface required!! The SW from Jam Origin simply creates polyphonic waves then converts each one to midi date. So it's an extension of the "Melodyne" technology used in their software.

Works (almost?) as well as midi guitar controllers, but uses your own guitar instead....