Add the water to a medium-large pot along with the rinsed organ meat, neck, carrots, celery, onion, and garlic. Turn to low on a large burner and bring to a boil.
Once boiling, move to a small or simmer burner on the lowest setting. Add the chicken carcass and cooked apple. Simmer on low overnight.
Turn off the burner, let cool, and drain the liquid through a metal strainer.
Discard the bones, carcass, vegetables, etc. and save for animals or Lomi (food composter).