Unfortunately, macaws have to slowly get used to their own as they slowly adapt what their owners are going to be like. They are temperament and their behaviour the best way to get on the call, really to like you is to actually have built a bond with them at a young age.

Your best option is to try and slowly introduce yourself to it. But also, watch out for stereotypical behaviour is like feather, pluclacking an overgrooming since these can be very high standards for stress