Harmonic Sense recently released ChordMate 1.0 for Macintosh OS X. Here’s what they have to say about it:

Choosing the right chord, and the right voicing for that chord, can transform a song. Whether you are a beginner, worried about stretching your fingers to the right frets, or a professional musician looking for just the right sound, ChordMate will find the chord voicing that is right for you. Just select the chord you want, and ChordMate will list all of the possible voicings, sorted either by quality, ease of play, or a bit of both. The results are customized based on the type of guitar: classical, acoustic, jazz, or electric. You can even listen to how the chord would sound on your guitar.

Trial Download:
URL: http://harmonicsense.com/ChordMate.dmg

System Requirements:
Mac OS X v10.4 or later
PowerPC or Intel processor

Full Version Cost:
9.95 USD

Website:
http://www.harmonicsense.com/