MacDonald has rejoined the Glovers on a three-month loan deal after being frozen out at the Liberty Stadium.
But MacDonald, who had a loan stint at Huish Park last season, believes he can still make his mark at Swansea.
He told the South Wales Evening Post: "My contract runs out next year but I am not going to worry about contracts for the moment.
"I think everybody knows that my dream is to play for Swansea, my hometown team. But I am not getting games at the moment and I just want to play.
"At my age I need to be playing regular football and hopefully going to Yeovil will give me that chance."