Download of Self Rap 1.1.3 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is a product of Music Breath. We recommend checking the downloaded files with any free antivirus. The software lies within Audio & Video Tools, more precisely Music Production.
From the developer:
Self Rap will automatically turn your speech into RAP. You can talk and record, then choose a track for your back or first, choose a track for your flow and then freestyle in real time. The tool supports backing tracks of most rap genres, including Hip-Hop and R&B, Old School and Latin Rap, Gangsta and Crunk, Trap and Underground, East Coast and West Coast Rap.
You may want to check out more Mac applications, such as Record Audio Pro, Songtree Music Maker or Eclipse-RPC, which might be similar to Self Rap.