If you are searching for a "Free Download Full Version" for Mac, you must be cautious. Antares is a premium software company, and Autotune 5 was never released as freeware.
It lacks the bloat of modern plugins, focusing on the core Retune Speed and Humanize knobs. Autotune 5 Free Download Full Version Mac
If your budget is zero, there are excellent free plugins that mimic the Autotune 5 workflow: If you are searching for a "Free Download