So Mac says in a new federal lawsuit -- obtained by TMZ -- a guy named Mike Dean bought one of his CDs in front of the hotel, and the next thing he knew his song -- Made in America -- was cut 11 on the album. Jay Z's song is also called Made in America, and gotta say ... they sound similar.
And the plot thickens ... Mike Dean is one of the producers of the album.
Mac had filed a similar case in New York State court a few months ago, but now he's gone federal.
Mac wants Jay, Kanye and Frank to pay him a cut of the profits.