In a small microwave-safe bowl, combine raisins and water. Cover and microwave until the water boils, about 1 minute.
Remove from microwave and let stand until the raisins are plump and most of the water has been absorbed, about 5 minutes. Drain any remaining water.
In a large bowl, whisk together mayonnaise, vinegar, and honey. Add apples, celery, walnuts, and drained raisins and toss to coat.
Cover and refrigerate at least 30 minutes or up to 2 days in advance. Season to taste with salt and pepper before serving. The Opal® Apples will not turn brown when cut.