NUSofting has released the Universal Binary version of Microrock Pro for Mac OS X AU/VST.
Microrock is a monophonic, "physically modelled", synthesizer with filters, distortion, overdrive, wah, chorus, vibrato and delay effect. It is ideally suited for bass, lead and powerchord lines and is designed to deliver an aggressive and expressive sound for solos and riffs, similar to those you might get with an electric bass or an electric guitar through some pedal effects.