KS Chromatic Tuner AU for Mac

From Katsura Shareware:

A 12-note chromatic scale tuner Audio Unit plug-in. You can use KS Chromatic Tuner AU to tune your guitar, bass, and other musical instruments.
NOTE: Requires a host application that supports Cocoa UI Audio Unit plug-ins such as GarageBand 1.1 and later, Logic Pro 7.1 and later, Logic Express 7.1 and later.

• Tuning: 12-note chromatic scale
• Temperaments: Equal Tempered, Kellner, Kirnberger III, Meantone, Pythagorean, Vallotti, Werckmeister III, Young II, etc.
• Meters: cent, hertz.
• Range: A0 (27.5Hz) - C8 (4186.0Hz)
• Calibration: 349.0 - 499.9Hz (0.1Hz steps)
• Accuracy: +/-1 cent
• Transpose: +/-11 semitones