macOS no longer ships with Emacs
batsov.com
batsov.com
nano no longer ships with macOS either, and hasn’t for a few major versions. You can still see it in /usr/bin/nano, but when you run it or check the manual you’ll see it’s actually pico. A checksum confirms they’re the same.
$ sha256sum /usr/bin/{nano,pico}
876a9d04b6a5276552751d43fc4bc893d031f0591a96850792649e945d644dc1 /usr/bin/nano
876a9d04b6a5276552751d43fc4bc893d031f0591a96850792649e945d644dc1 /usr/bin/pico