Tune your acoustic or electrical musical instruments by ear, or by using the built-in DSP algorithm. Select the preset for a certain type of tool and control the manual adjustment in real time. Save the tuning results, apply the required settings at the start of every session.
insTuner 1.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is a product of EUMLab. The program lies within Audio & Video Tools, more precisely Music Production.
From the developer:
insTuner is a chromatic tuner that helps you tune instruments quickly and accurately. With its large and clear display, you can tune your instrument without any difficulty. It is suitable for tuning acoustic and electric guitar as well as bass, ukulele, mandolin, banjo, bouzouki, bowed strings, woodwinds, brass, timpani and more. In fact, almost any instrument that sustains a tone can be tuned using insTuner.
You may want to check out more software for Mac, such as CROSS-DJ, FuzzMeasure or AmpliTube Metal, which might be related to insTuner.