SoundObject 1.0 for Mac can be downloaded from our website for free. This free Mac app is a product of DashboardMusic. SoundObject for Mac relates to Audio & Video Tools.
From the developer:
Check out the SiON SoundObject Quartet, a sound sequencer with Arpeggiator, Drum machine, Bass sequencer and Chord Pad. Produce awesome tunes right for your Mac OS X Dashboard. You can use the arpeggiator MIDI plugins for triggering beats from drum machines.
You may want to check out more software for Mac, such as M-Audio Key Rig, which might be similar to SoundObject.