The 0.9 version of Circular Spectrogram for Mac is provided as a free download on our website. The unique identifier for this program's bundle is com.circularspectogram.Circular Spectrogram. The application lies within Lifestyle Tools, more precisely Travel. This free Mac app was originally developed by Andrew Ohlmann. Commonly, this program's installer has the following filename: parallax_stacker.zip. The most popular version among the application users is 0.9.
From the developer:
An audio toy made to generate circular spectrograms.
Quartz Composer sketch that maps a real-time spectrogram to a circle.
Macintosh-only, untested on everything except my installation of OSX Lion.
They're rough around the edges, so the usual disclaimers apply.
Software provided "as is" ; use at your own risk.
You may want to check out more software for Mac, such as Circular Studio, Water Circulation - Pollution And Purification Systems or SoundView, which might be similar to Circular Spectrogram.