MiBAC Music Software today announced that it will formally introduce Music Lessons I Fundamentals for Macintosh OS X 4.0 (10.2 or later) and Music Lessons II Chords and Harmony 1.1 at the Winter NAMM show, which takes place January 20-23 in Anaheim, CA. Both new versions of the software have been rewritten to take full advantage of the native CoreMidi and QuickTime features of Mac OS X. Both products are priced at US$123 and the company notes that an upgrade path is available for previous owners of the program(s).