Wilson has signed permanently with the Dons.
McInnes said: "He's a boy I hope now is an Aberdeen player rather than a Man United player, that we can really work with.
“He was influential towards the end of last season and we feel he's found a home that he'll be settled in as opposed to being a United player who was put out here, there and everywhere.
“There is a young player there who had a lot to deal with in his short career but hopefully his best years are ahead of him and he can repay our faith in him by kicking on now.
“Everybody seems to know the level of contract he was on which was a huge amount on a four-year deal which, for a young man is not easy to deal with. He was just floating the last few seasons and nobody gave him an incentive.
“He had injuries and a disappointing loans and there was a perception he was underachieving, but James is a boy you need to get to know.
“He has work to do and needs to throw himself into this. We'll put everything into getting the best out of him but he has to do it too. Getting him confident, fit and playing with a smile on his face is the key."
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