"I didn't want to leave," McDonald joked. "I wanted to stay as long as I could."
McDonald, who is very familiar with the football program, wanted to visit on a weekend when the Trojans didn't have a game, so he could learn more about the academics and everyday life of the players.
"I wanted to come this weekend because they didn't have a game, and see how it is," McDonald said. "I have been to practices and games, so I wanted to see what school life is like."
The four-star safety's first stop was at the Marshall School of Business.
"They wanted to emphasize the student-athlete part," McDonald said. "So the first thing they did is take me over to Marshall School of Business because I wanted to major in Business.
"It gets you motivated. It's a good feeling knowing that you are fortunate enough to be at one of the best university's in the United States."
On the trip, McDonald was hosted by Taylor Mays.
"It was real fun hanging out with Taylor (Mays)," McDonald said. "We kind of come from the same background with both of our dads playing in the NFL. We kind of went through the same things growing up.
"He was telling me how you need to carry yourself as a football player. It was real cool.
"It would be cool to be able to stay in his pocket while he is there. Just to see how he carries himself and how he is a leader on the field."
The chance to talk about football and life with Mays was one of many highlights of the visit.
"I got the most out of talking to Taylor, and the stuff he was telling me," McDonald said. "You never know what they go through as a player. You know they are good, but you don't know how much they have to work at it."
McDonald also spent a good deal of time with secondary coach Rocky Seto.
"Coach Seto was really helping me a lot," McDonald said. "Hopefully, I will get him next year."
McDonald said he didn't discuss Seto's possible departure.
"I kind of stayed away from that question. I am sure they have a lot that they have to deal with," McDonald explained. "I am coming to USC regardless. I know that Coach Carroll will have us in good hands.
"I would love to play for Coach Seto because he has done a great job recruiting me. He is a good person, a real humble person. If I can't, it's good for him that he is getting a defensive coordinator job. Either way I know I will be in good hands."
McDonald was able to get to know some of his future teammates and do some recruiting of his own.
"All the other recruits were real cool," McDonald said. "We all got along good. I don't think there was a complaint at all.
"I got to meet Corey Adams for the first time," McDonald said. "He was having a real good time. I also talked to (Devon) Kennard and I think I got my point across to him."
T.J. McDonald talks with his father, Tim McDonald, who was an All-American at USC.
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