The Malaysian billionaire has earned criticism from fans for a string of unpopular decisions, including ditching the club's traditional blue in favour of red.
But after earning the point to take them into the Premier League, Mackay said: "A lot of money has gone into this football club over the last four years and I'm delighted for everyone involved.
"As a manager it's about looking after a group of people and asking them to come back time and again.
"They have done that and that is why I am so proud and pleased with what has happened. The owner has been in to the dressing room and he is someone who has been really hands on.
"A lot of credit has to go to him. For him to come over here and put trust in myself and the players is wonderful.
"He has made sure that we have got a blend of good players and good people in the backroom.
"You have to have good people to achieve something like this. It is a very tough division to get out of and we have achieved that." Cardiff now need one more win to go up as champions.
Captain Mark Hudson said: "We have finally done it. It has taken four years and it has been a building process. It is a great achievement and the manager has been great. He has done a wonderful job."