Extreme 1.0 has been available for Windows for a couple of weeks. MHC are now releasing an Audio Unit (Universal Binary) for Mac OS X. It has the same features as the Windows version.

Extreme is a hybrid synthesizer which plays an extensive set of extreme waveforms/samples, for example distorted, big, punchy, noisy and wicked waveforms, processing these using a filter, envelopes, an LFO, an ensemble, delays and an effect section which features 133 different effect modes, including crossfading effects and layered effects.