There's no evidence that McDonald's enjoys any unique fame in South Carolina compared to other U.S. states. The fast-food giant operates uniformly across the country, with similar menu offerings, branding, and popularity nationwide. While South Carolina has its share of McDonald's locations—often busy near highways and urban centers—the chain's recognition is consistent everywhere.
Regional variations in fast-food preferences do exist (e.g., Bojangles' or Chick-fil-A have strong Southern followings), but McDonald's remains a ubiquitous national brand rather than a state-specific phenomenon. Any perception of heightened fame likely stems from local marketing or personal experience, not systemic difference.