McGregor will be knocked out because floyd is a chicken runner and McGregor will be so tired then Chickenweather will just punch him. 
But seriously, I don't think Floyd has it in him anymore. His an old guy who lost his touch because of his own arrogance. I don't think he'll even last the till the score cards. I give him 5th round knockout.
The press conference will be the most entertaining part in this fight, one thing is sure that both fighters will be earning a huge amount of money with this single fight,it could even be the first billion dollar fight,if McGregor is to win he has to knock Mayweather in the first five rounds and if Mayweather figures you out then it is difficult to knock him out in the later rounds.But seriously, I don't think Floyd has it in him anymore. His an old guy who lost his touch because of his own arrogance. I don't think he'll even last the till the score cards. I give him 5th round knockout.