The Scot is set to be in charge of the Welsh club having been given a reprieve of sorts in the wake of owner Vincent Tan's ultimatum that he resign or be sacked.
"Our fans are the lifeblood of the club," said Mackay.
"When I'm gone and the owner is gone the fans will still be supporting the team. What they want to sing and what they want to say is down to themselves.
"They are intelligent people who have got their own opinions about the football club but I know they will get behind the football team like they have always done from the first day I have arrived there.
"I will always be thankful for that. If they do that then there can be enjoyment of watching their team in the Premier League."