The three-time World Player of the Year has held informal talks about joining City but the 31 year old will have to prove his fitness before a deal can be finalised.
City executive chairman Garry Cook confirmed the club still want to sign a superstar player after failing to land Ronaldinho.
Cook said: "We are only awaiting Ronaldo to confirm that he has recovered from knee injuries.
"I've got to change the culture at this club. Today you can grow quicker than it took Manchester United. We just need a superstar.
"China and India are gagging for football content to watch and we're going to tell them that City is their great content.
"We are a global franchise entity. We told Mark Hughes not to come here if he thought we didn't need a superstar."
However, his agent Fabiano Farah claims there has been no official contact from the club.
"Our only concern is that Ronaldo continues with his fantastic recovery.
"He is clinically recovered and has fulfilled all stages of the process of rehabilitation."