South African born Baccus joins City following four years with Western Sydney Wanderers.

Scottish midfielder O'Halloran, who arrived at City in the off-season, has sustained a hamstring injury.

City coach Warren Joyce said: “Michael O’Halloran has been training well so losing him to injury is unfortunate, but we’ve secured a quality replacement in Kearyn Baccus.

“Kearyn will add quality and brings a wealth of experience to the squad, helping to maintain the current tough competition for places.”

Baccus said he was looking forward to showing the Melburnians what he was capable of, as he joins training with immediate effect.

“I’m excited to have a fresh opportunity at Melbourne City and will be doing all I can to support the team over these next few months,” Baccus said.

“I’m here to work hard, develop my game and show the Melbourne City fans what I can do.”

City line up against Baccus’ former club on Friday night as the two A-League outfits head to Shepparton to play out their final pre-season friendly before the season kicks off against Melbourne Victory on 20 October at Marvel Stadium.