"We've made a bid and it has been turned down," Mackay confirmed today.
It's thought City offered in the region of £500,000.
Noone has scored twice for Brighton in 19 legaue starts this season.
His current manager Gus Poyet said
"At the moment it's going nowhere. I don't know what is going to happen but what is true right now is they've got no chance.
"They would have to more than significantly up their offer."