Big McIntosh is Applejack's and Apple Bloom's older brother and part of the Apple family. He makes his debut in the first episode, during which he idly walks in Ponyville the moment Twilight Sparkle first arrives. Later, Applejack introduces him during the Apple family reunion, although he has no speaking roles until the fourth episode, Applebuck Season. He is soft-spoken and often replies with a simple "eeyup" or "nnope". He is first called by the nickname Big Mac in The Cutie Pox.
- Big Mac will meet Winnie the Pooh and his friends in Pooh's Adventures of My Little Pony Friendship is Magic.
- Big Mac met the FT Squad in The FT Squad's Adventures in My Little Pony: Friendship is Magic.
- Big Mac is also best friends with BoCo.
- Bic Mac will guest star in Thomas and Twilight Sparkle Meet Spirit: Stallion of the Cimarron.