He lost an appeal on the severity of the ban, but was allowed to commence riding trackwork and trials from April 3, six weeks before his disqualification ends on May 15.
While he has kept himself in excellent physical condition over the past year and a-half through a combination of golf, squash and a daily 10km walk with his girlfriend Katelyn Mallyon, McDonald intends ramping up his fitness regime in readiness for his raceday return.
"The last month or six weeks I've been working really hard. It's been like a 15-month holiday and while I've been keeping fit, this is another level altogether, though the hard work won't hurt me," he said.
As a jockey, you are in that bubble 24-7 and you don't get a let-up, especially around carnival time.
"I've been working with a conditioning coach, working on my core and my fitness as well as working on strengthening for the position I'll be in when I'm riding."
McDonald said the enforced break has him refreshed ahead of his return and given him a chance to reflect on what was most important to him.
"It's something I will always regret but I have to take the positives from the negative.
"It's been a great freshen up. I've had two Christmases not wasting for racing on Boxing Day. I've travelled and had a good amount of time to think about things and realise that there's more to life than just racing.
"As a jockey, you are in that bubble 24-7 and you don't get a let-up, especially around carnival time and before I was disqualified I was going from carnival to carnival around the world.
"This break has opened my eyes and shown me that riding isn't the only thing in the world and I think that's going to be better for me in the long run."
Still just 26, McDonald was a three-time champion apprentice, setting a New Zealand record of 207 wins for a season in 2010-11, one of three seasons he was named champion jockey at the NZ Racing Awards.
He shifted to Sydney in 2012 and by the end of the 2013-14 season, McDonald had sealed his first metropolitan jockeys' title and claimed the Gr.1 Golden Slipper (1200m) aboard Mossfun, to go with his other marquee wins on Dundeel in the Gr.1 Queen Elizabeth Stakes (2000m), Rising Romance in the Gr.1 Australian Oaks (2400m) and Shooting To Win in the Gr.1 Caulfield Guineas (1600m).
At 22, he had already ridden 1000 winners and ridden in a Group One race at Royal Ascot, all leading to sealing a contract as number one rider for the global racing powerhouse Godolphin.
For his return to racing, he is looking at playing the long game.
"My goal is to have a really big spring. The next four or five months for me is about rebuilding contacts so I can really make hay in the spring," said McDonald, who has 30 Group One wins to his name. "I did think about heading overseas for my return, but then thought better of it. I have unfinished business here and it starts with me getting my name back up in lights."
- NZ Racing Desk
