Rangers signing McKay obtains UK visa ahead of September arrival
"I just got my visa today and I'm really excited. It took a bit longer than I expected but it's great to get it all sorted now," he told the club's official website.
"It's a difficult process to get through but I'm glad it's all done now. I have been fast-tracked through and I can't wait to get started now.
"It's not the best as you are waiting around when you know you could be over in Scotland playing games.
"I'm staying back in Australia to play in our World Cup games as it's a long way to go to Scotland in time for the game at the weekend and it makes more sense to stay here now.
"But our second game is in Saudi Arabia so I'll go to Scotland from there so that I arrive in Glasgow on September 7.
"I'll be ready for the Dundee United match just after that. I'm used to the travelling and quick turnarounds after internationals in Europe so I'm prepared and all set to go.
"I just want to play now. Our longest wait was for my work permit but once that came I was delighted and now the visa is through too I can concentrate on playing for Rangers."