This is from We with June-Young Lee (이준영의 WE).

In August 2011, while battling pancreatic cancer, Steve Jobs handed over the CEO position at Apple to Tim Cook. Fifteen years later, on the 31st of last month, Tim Cook handed over the position to Senior Vice President John Ternus. Tim Cook became CEO at the age of 51, and John Ternus became the head of Apple at the same age.