A change in leadership has occurred at a major tech company. John Ternus has taken over as CEO, succeeding Tim Cook who led the company for 15 years. During Cook's tenure, the company's value increased significantly to $4.6 trillion.

This growth is attributed to the popularity of one of the company's key products. The transition in leadership took place on a Tuesday.

Further details about the change in leadership and the company's future plans are available from the source.