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 SongScreen Liquid, which might be similar to SoundObject.