Cook macaroni according to package directions; drain. Rinse with cold water; drain. Chill at least 1 hour.

Cook ground round in a large skillet until browned, stirring to crumble; drain off drippings. Stir in taco seasoning and French dressing; cool.

Combine macaroni, beef mixture, and remaining ingredients in a large bowl, tossing well. Serve salad immediately.