The T-Pain Effect
The T-Pain Effect 1.0 for Mac can be downloaded from our website for free. The actual developer of this Mac application is iZotope.
From the developer:
Music-makers, start your T-Pain engines! This self-contained beat-making and vocal recording application powers you through from start to finish, even if you're brand new to music production.
You may want to check out more software for Mac, such as HomeImage Effects, Course For Final Cut Pro X 106 - Titles, Effects and Compositing or SoundToys TDM Effects V3 Authorizer, which might be similar to The T-Pain Effect.