Start by cooking macaroni pasta according to the package directions. Drain all the water and add the cooked pasta to a large mixing bowl. Mix the hot pasta with apple cider vinegar. Set it aside.
Whisk together mayonnaise, milk, sugar, salt, and black pepper in another medium size mixing bowl.
Add carrots, onions, celery, and salad dressing over the pasta and toss until the macaroni is well coated.
Chill the salad for at least 2 hours before serving.