The athlete claimed to the court that he had tried unsuccessfully to pay the fine.
"What I heard was that I tried my best to pay for it. I attempted to pay it. I don't know… it didn't pay and that's it. I apologise and I want to show my respect by showing up today. I apologise," Mr. McGregor said in court.
According to his lawyer, Mr. McGregor entered into a guilty plea, agreeing to pay the amount specified by the fine.
Conor McGregor recently faced American wrestler Floyd Mayweather in what was known as the 'Money Fight' on August 26, 2017.
Floyd Mayweather Jr. hits Conor McGregor in a super welterweight boxing match Saturday, Aug. 26, 2017, in Las Vegas.
© AP Photo / Isaac Brekken
Despite losing to the Mayweather, who was awarded US$300 million, McGregor still took home US$100 million.
Floyd Mayweather Jr., left, and Conor McGregor pose for photographers during a news conference Wednesday, Aug. 23, 2017, in Las Vegas.
© AP Photo / John Locher
