The celebrity chef, known for his fiery temper, reportedly said the closure of the restaurant, established just over two years ago, was due to the economic downturn.
Meanwhile other top restaurants could be heading the same way with even cut-price offers failing to keep them afloat.
McGrath’s fellow chefs in the capital said it was a shame to see the talented and committed chef go to the wall.
“It upsets me to see a restaurant of that calibre go, lesser restaurants I wouldn’t mind seeing them close, but not Mint,” said Derry Clarke, executive chef of L’Ecrivain.
“People have their opinions of Dylan, but I’ve always liked him. He’s a brilliant young chef and it’s an awful shame to see him gone.
“I’d definitely say to anyone going out of business, there’s no shame in it,” he told Herald AM.