The End of a Golden Era: Tim Cook's Legacy and John Ternus' Tough Task Ahead The transition from Tim Cook to John Ternus at Apple marks the end of an era, one that spans over a decade.
During this time, Cook has guided the company through turbulent periods, including the tumultuous 2011 period when he took over as CEO.
Under Cook's leadership, a coterie of near retirees accumulated immense power and influence within the company.