Apple's official announcement on April 20, 2026, that senior vice president of Hardware Engineering John Ternus will succeed Tim Cook as CEO effective September 1—with Cook transitioning to executive chairman—has driven Polymarket trader consensus to a unanimous 100% implied probability on Ternus. Long viewed as the heir apparent due to his low-profile leadership in hardware innovation, including key Mac and iPad developments, Ternus edged out rivals like Sabih Khan and Craig Federighi amid prior speculation fueled by Bloomberg profiles and his rising visibility at events. While the planned handover solidifies positioning, rare challenges could arise from unforeseen board shifts, regulatory hurdles in executive transitions, or health issues before the date, though traders see minimal risk given the formal commitment.