Not sure why this was posted here, but as many talking heads around the internet have said, McGregor has already won. There is extremely little for Conor to lose in the fight. Mayweather hasn't knocked anybody out in a long time, he breaks his hands a lot, and McGregor is much bigger than him. The chance of Floyd KO'ing Conor is very small. Could he be slippery as hell and embarrass McGregor over the course of 12 rounds? Very possibly.
But that "embarrassment" is almost immediately negated by the fact that it's not an actual fight. It's a sporting event where at least 75% of one fighter's abilities are taken away. Boxing is great, but I can't take it seriously as a fight. So, therefore, even if Floyd makes Conor look dumb, everybody knows it's only because they're playing the game that Floyd is good at. If it were actually a real fight, McGregor would massacre him.
That's why Conor has already won. It is a win-win no matter what happens. If Floyd beats him, it's because they're playing "pillow glove slap party". And if Conor wins, he's the most legendary combat sports athlete of all time. And either way, he makes a ridiculous amount of money.
But if we're talking "How can Conor beat Floyd?" he has to get inside and make it ugly. Floyd clinches almost any time somebody touches him. He is a master of not taking damage. Conor can't just coast through the fight and allow that. Being the bigger man, he has to cut off the ring, get in close, and when Floyd tries to grab on, be strong enough to push him away and keep swinging.
When Pacquiao fought Floyd, he was content to just let Floyd grab him and wait for the ref to break them apart. But maybe as a boxer, that's just what Pacquiao is used to and has been conditioned to expect. Maybe Conor NOT being a boxer will help him in that regard. If Conor can't find a way to throw uppercuts in the clinch, he has zero chance.