You can download Discovery 4.1 for Mac from our application library for free. The program is included in System Tools. This software for Mac OS X was originally created by com.Iomega.
From the developer:
Discovery is a 8 oscillators Virtual Analog Synthesizer featuring 4 layers, 2X oversampling/undersampling, built-in arpeggiator, sync, FM, 8 filter types, unison edit, panning modulation, stereo delay and gate effects.
You may want to check out more software for Mac, such as BlackArmor Discovery, NSS Discovery Tool or Discovery Tool, which might be similar to Discovery.