In a long statement to the The Evening Telegraph, MacAnthony has wrote:
"I am in New York on business at the moment and missed Tuesday night, but I stopped an important business meeting to speak to the manager after the game as I knew how low he would have been feeling and the importance of letting him know that we lose together and win together.
"I reminded him that we create 13 chances on average per game, more then 90 per cent of the other teams in the Championship. I reminded him about where we have come from and then I reminded him who he is as an individual and how we and he are better than this and will come through it.
"I also reminded him of the need for a siege mentality, a bit like when Macclesfield came here two years ago one January and beat us.
"I have spent the last five years using a siege mentality to better myself, my businesses and my life.
"Five years ago the most important person in my life was losing the battle for her own, my own relationship with my partner was coming to an end and my business was up against it and going nowhere fast.
"It would have been easy to throw the towel in after my mother passed away, but then again I never do the easy things well.
"I went for the impossible and used a siege mentality to do it, not listening to the doubters or the negative people and within 24 months had got married to the love of my life, had beautiful children and built my business into the biggest in its industry, doing it all with very little money, but a hell of a lot of belief and positive mental attitude.
"Right now as a football club we have approached a crossroads. We have lost 50 per cent of our league games and made a lot of mistakes in losing them.
"Our gates are poor and people locally do appear to have lost some faith as shown with a pathetic attendance of 6,500 (Posh fans) on Tuesday night.
"Pundits and fans want us to change our policy and bring in experienced replacements for our youngsters who have got us here.
"Our ground is falling down and we pay a load of rent and spend money improving it when we all know that within four seasons we will be gone from here.
"Our new ground isn't happening as fast as we would like it and we don't even know where we will be in four years.
"So I guess we all have a choice to make at this crossroads. Do we say, ah sod it, let's sell some assets and throw in the towel and go back to the lower leagues where people feel we belong? Not a chance in Hell!.
"We use these circumstances around us to come together, fight together and get ourselves out of this hole as quick as possible and ignore what's been said outside of our four walls.
"We did not come to this league to be laughed at or be known as the whipping boys, we came to compete and to entertain and to excel ourselves and go even further.
"This is what my team is all about and they have not let me down yet and have not started now. They belong here and they will get us out of our current situation and there is no better manager in this country to do this with them than the one we already employ.
"So I challenge the Posh fans out there to get off their arses on Saturday, make the Forest game a sell-out, not for financial reasons but for team spirit reasons, and make it a horrible place for Forest to play at and let's get our season back on track quickly.
"As for any person out there who is asking for our manager to leave or is tipping us for relegation, go support Lincoln or Northampton as I am sure they could do with your positive vibes around their clubs!"