Wow...
Have you ever had a Macaw before? Any idea of how old she is? I looked but couldn't see a band on her leg from the photo's does she have one? PLEASE let her have one....

Well, Macaws need more than a seed diet. They need nuts and fruits and veggies and BIG wooden toys to destroy. They require a diet higher in fat from nuts and big seeds that most other birds do Almonds, walnuts, brazil nuts mine aren't too keen on hazel nuts and they LOVE banana's (at least mine do)
I feed a good pellet, and I feed a Macaw mix of seed and dried fruits and nuts I like Volkman Macaw, And then I also feed fresh fruits and veggies, beans, pasta etc.
Don't let the beak intimidate you...and she will if she can, so while you have her in a honeymoon period, hold her close to your body so she can't strike easily and start playing with her beak. Get used to the idea that yes, you are going to get bitten, usually they give small warning pinch bites unless they are really upset then they do a crushing bite. Remember to push up into the bite toward the back of their head and into the corners of her beak. they can't get as much leverage when you do that, Calm deep voice not loud, "No biting"
I know you're thinking, Ya right...calm voice uh huh... The macaws I have responde much better to calm deep toned voices when your correcting them than they do loud high pitch, that only excites them more. Plus if you can control their upper mandible they will calm down.
Have you heard about the "strike zone" before, every bird has one its the distance they can reach on a lunge, SO if you keep them farther away from you than their strike zone they can't bite you or if you keep them much closer than their strike zone they are less apt to get you as well.
Macaws kind of have to rare back and raise their beak in order to strike to they basically telegraph what they are going to do. Plus they'll pin their eyes.
I have a method that a couple of my mentors showed me for picking up or asking a macaw or any other bird for that matter that you don't know well to save you from getting some real severe bites. Its not to say that it won't still hurt, but they can't get ahold of as much meat by doing it this way.
Hold your arm out with your palm down, make a fist and keep your thumb tucked tight against your fingers. Watch what that does to your arm tissue and muscles it should make everything get tight or tighter. Less easy to get a good bite of. Move in from underneath and put your arm up against thier chest right at the leg, and push up and give the step up command. Keep your arm so your palm is facing down, because if you rotate your arm it exposes softer tissue and changes the tone of the muscle giving them more area to connect with if they choose to bite. I immediately pull them in close to my body and keep them below my chin. Strike zone is now closed considerably. Plus you have clothes that they can grab rather than skin.
Remember calm deeper toned voice. And don't allow it up on your shoulder until you are sure it will step up every single time you ask it to and you can trust them.
Others may have more to contribute and different methods to handle them, but this works for me. Once you have your "bluff" in and they realize that you aren't afraid of their beak, they usually behave themselves quite well.
You're going to love having a blue and gold they have great personalities and they love to play and they really do have a sense of humor once they bond with you. And it can be a slow process for them to bond with you...I got my Bailey when she was 18 years old, She tested me on many occasions but when she realized that I'd just take the bite and keep going, she basically just quit. She'll still give me little nips once in a while to let me know she's in a bad mood or just is tired or doesn't particularly want to do what I asked, but generally she'll go ahead and do what I ask. But even though she'd allow me to hold her and pet her and do tricks with her, she didn't show her true personality. In a relaxed body posture etc. for about 6 months Then she started wanting to snuggle and she'd tickle me with her beak and tongue and let me know she wants to play etc. Now when we play tickle she initiates it and then she'll tell me tickle tickle. And then laugh.
So don't rush and don't get discouraged Macaws or at least a lot of Macaws are slow to trust.
And you'll find that they really like you to play with their beaks once they trust you and you trust them.