Keane is working with McCarthy as Republic of Ireland assistant coach.
â€śIâ€™ve seen James a number of times and that will come with age,â€ť he said. â€śI was in the same boat myself when I was at Nottingham Forest and youâ€™re surrounded by senior players and then you get a move to United.
â€śYouâ€™re working with Bryan Robson and you mature into the job so thatâ€™s a process James will go through. Itâ€™s nothing unusual for a young player.â€ť
Keane added: â€śIf heâ€™s playing week in, week out for Everton, the benefits will be for Ireland as well - but donâ€™t be trying to make him something heâ€™s not, that will take a bit of time.
â€śHe might never be a ranter or raver but sometimes itâ€™s not about that. Itâ€™s about making more demands of his team around him or demanding the ball in certain situations.
â€śAll that will come of age. Donâ€™t be impatient with him.â€ť
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball