This time around over 9,000 locations (out of over 14,000 total) nationwide are offering the sandwich. If you are having trouble locating where to get it, you can try the McDonald's Finder app or Uber Eats app to help you along (they're both available for Android and iOS). The official launch date is October 29, 2018 but some locations already have it available (It's being sold for $2.99 at my local McDonald's).
The McRib features seasoned boneless pork shaped in a vague rack-of-ribs-like shape served with tangy barbecue sauce, slivered onions, and pickles on a toasted hoagie-style bun.
The McRib's last appearance was in November of last year.
Photo via McDonald's.