Watch: McGregor doubles down on prediction he'll KO Mayweather inside 4 rounds

It was only a matter of time before "Mystic Mac" made an appearance under the bright lights.

Conor McGregor's soothsaying alter ego was at it again when he and Floyd Mayweather shared a stage in Los Angeles on Tuesday for the first time ahead of their blockbuster bout. "Mystic Mac" took the stage first at the packed Staples Center, and after basking in the limelight for what will mark the biggest matchup of his career, boldly predicted Mayweather would be out cold inside of four rounds - a statement that echoed what UFC president Dana White told FOX Sports on Monday.

Related - White: McGregor says he'll knock out Mayweather 'within 4 rounds'

The Irishman will look to walk the walk on Aug. 26 at T-Mobile Arena in Las Vegas.