Why can't I use flyspell-mode? Error: (Searching for program No such file or directory ispell)

Question

I am using Emacs on a macOS Monterey 12.5 with M1 hardware. This is my init file.

I used to use in a Linux (NixOS) machine this init file (or something very similar) without ever having a single problem with flyspell-mode. Now, on a new machine under macOS I am using the same init file and after trying to enable flyspell-mode the mini-buffer echoes:

(Searching for program No such file or directory ispell)

How to fix this?

Answer 1

The answer was basically installing aspell via brew package manager.

$ brew install aspell

There was no need for further configurations on the init file.