The Australian actor, whose mother Lady Sonia McMahon died from cancer earlier this year, said that it is "important" for him to be with his sisters Melinda and Deborah and his 9-year-old daughter Madison from a previous relationship.
McMahon told The Sunday Telegraph: "This has been a hard year with my mum passing away and I had a period of time where I didn't come here much.
"I will live back and forth now between LA and Sydney because I've got my sisters here and I think it is an important time for us to be together.
"I haven't worked in this country for probably 20 years so it's nice to come back home, to be honest. I am going to spend some time with my daughter because I've spent most of this year away from her, which I promised myself I wouldn't do."