- Cook the elbow macaroni according to package instructions until al dente. Drain and rinse under cold water to cool. 
- In a large mixing bowl, combine the mayonnaise, apple cider vinegar, Dijon mustard, sugar, salt, and black pepper. Whisk until smooth. 
- Add the cooled macaroni to the bowl with the dressing and mix well to coat. 
- Stir in the diced celery, red bell pepper, red onion, sweet pickle relish, and chopped hard-boiled eggs. Mix until all ingredients are evenly distributed. 
- Cover the salad and refrigerate for at least 1 hour to allow the flavors to meld. 
- Serve chilled and enjoy!