The 23-year-old recently lost his top world ranking spot to Tiger Woods having endured a poor start to the year.
However, McIlroy believes that he is ready to pick up his first green jacket and third Major win in Augusta.
"Would anything less than a win be a disappointment this week? Yes, it would be," McIlroy told BBC Sport.
"Every time you come here you're wanting to win that Green Jacket and every time you don't, it's another chance missed.
"But if I'm sitting here on Sunday night and I've finished second or if I've given it a good run, you can't be too disappointed because you've had a great tournament. But the ultimate goal is getting one of those jackets."
The Northern Irishman has a poor record at the Masters, with his best ever finish coming tied for 15th in four visits to Augusta.