The West London club have spent around £100m on 12 new players following their promotion back to the Premier League, bringing in the likes of Jean Michael Seri, Andre Schurrle and Aleksandar Mitrovic.
"We are going to give it a right old blast this season," said McDonald. "We are not here to make up the numbers. We are here to prove to everyone what we can do, prove that this is where the club belongs. The owners have invested money wisely and bought some really good players. That can only benefit the team.
"People are seeing all these big names coming in and the money we are spending so it is understandable that from the outside expectation levels have been raised. But we are a level-headed group of players and we know where we stand.
"We would be naive to start looking above to the top half of the table. First and foremost we have got to establish ourselves as a Premier League team. Of course we want to finish as high as we can but we know it is going to be a long, hard season."
Fulham face Crystal Palace at Craven Cottage in their opening league fixture on Saturday.