The rift stemmed from comments Julian made about Yoko Ono, he told the Post. Julian's mother is John's first wife, Cynthia.
"I thought it time to make big changes in my own life," Julian, 44, told the Post in what the paper said was his first interview since 1999. "Part of that has been to get Sean back into my life, because I love him so much."
After contacting Sean's tour manager this year, Julian surprised his half brother backstage after a show in Prague. "We just hugged and held each other," Julian recalled.
Julian joined Sean, 31, on the tour bus, sleeping on the floor and traveling through Croatia and Slovenia, he said.