1. Combine apple cider vinegar, honey, Dijon mustard, garlic powder, cayenne pepper, and salt in a large non-reactive bowl. Mix well then add the beef. Marinate for at least an hour.
2. Preheat your Air Fryer to 400 F (200 C).
3. Place the steaks in the Air Fryer basket and cook for 15 minutes or to desired doneness.