Download of Mopis 1.2 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software lies within Audio & Video Tools, more precisely Music Production. This software for Mac OS X was originally designed by Nethernet.
From the developer:
Mopis is a high-quality software synthesizer that combines traditional subtractive synthesis with new technology we call reconstructive synthesis.
Mopis uses subtractive synthesis to create the same sounds that analog synths have used for years. The oscillators generate basic waveforms-- sawtooth, square, triangle, and sine waves-- which are processed by Mopis's filters.
You may want to check out more software for Mac, such as MopiShape Draw, which might be related to Mopis.