Macaws are more omnivorous than most parrots and will readly try anything. a balanced diet of seeds, nuts, fruits and vegetables is vital.
if you feed a pellet mix diet be sure to include some seed (it doesn't have to be daily) and nuts, macaws have a higher metabolic rate than other species and need a higher fat diet. hyacinth macaws have the fastest metabolism and will eat mainly nuts in their diet.
if your macaw has clipped wings or doesn't have much exercise limit the intake of the higher fat foods (seeds & nuts) unlimited access will result in weight gain.

macaws in the wild will pick at a carcass to get proteins, so small servings of chicken and fish go down well....they must be cooked, never feed these foods raw!

like with humans, macaws can have vitamin deficiancies if they dont eat properly.
vitamin A deficiancy is the most common.
once a week i serve mashed sweet potatoes (loaded with vit A) and boiled eggs. boil the eggs for at least 30 mins first and crush uo in their shells! the shell is a good source of calcium, the egg yolk has vit A and the egg white is full of proteins to help absorb these nutrients.

plain air popped makes a nice treat although it hasn't got much nutritional value.
and dried mix pulses that you leave to soak overnight are full of nutrients and macaws love them.
also no added sugar fruit juices are a readily accepted treat.


fruits to try are veg to try are

oranges
bananas
apples
raspberries
blackberries
strawberries
grapes
melon
mango
pineapple


veg to try are

kale
carrots
rocket
brussel sprouts
peppers
broccoli
green beans
sweetcorn
sweet potatoes
celery

nuts to try are

walnuts
almonds
cedar nuts
palm nuts (high in fat so only 1 or 2 and not too often)
hazelnuts
brazilnuts

also sugar cane makes a nice treat!

when offering foods, make them fun. a macaw is perfectly capable of peeling their own oranges and bananas, it part of their foraging instinct.
hide foods around the cage, even wrap them in paper or put them in a cardboard box.

never feed a parrot avocado, onion or rhubarb, and remove cherry pits, plum pits and peach pits etc before offering them to your bird, these things are toxic and potentially fatal.

although not a food, macaws need A LOT of wood to chew!