However, the right-back expects to remain on the sidelines for much of pre-season.
McMahon missed the Blades' League One play-off campaign with the troublesome problem that has plagued him for much of 2013.
He recently visited a specialist to decide the next course of action but was told further treatment was not necessary.
"I went to London to see the specialist again last Wednesday and the good news is I don't need further injections or to wear a protective boot," McMahon told the club's official website.
"The plan now and throughout the summer is to do plenty of strengthening work. But it isn't going to be a quick fix, it will still be the back end of pre-season when I am fully fit.
"I played with the initial problem for two or three months, because of my character I just keep going until I can't go any further.
"It didn't settle down in time for the play-offs which was a massive disappointment personally, but now I have to get things sorted in the summer months.
"I was at both play-off fixtures and it was a real bitter pill to swallow, we should have been capable of reaching the final at the very least, but that is history now and we must react positively."