You could have downloaded PowerCore 4.3.3 for Mac from our software library for free. The actual developer of this free Mac application is TC Electronic. The program belongs to Audio & Video Tools.
From the developer:
PowerCore can be used as a VST instrument for Windows or Mac, as well as an AudioUnit plug-in under Mac OSX. The actual synth engine is powered by PowerCore, saving the host's CPU for other tasks.The sophisticated patch management gives you control over thousands of patches organized in automatically created hierarchical menus.
You may want to check out more Mac applications, such as Resound, SoundByte or Lounge Lizard Session, which might be related to PowerCore.
Music Production
Music Production