Tim Cook officially concluded his 15-year tenure as Apple CEO on August 31, 2026, transitioning to the role of Executive Chairman. His successor, John Ternus, assumed the CEO position on September 1, 2026, inheriting an organization that transformed from a hardware-focused manufacturer into a $4 trillion ecosystem spanning health, finance, and spatial computing. Under Cook’s leadership, Apple’s market capitalization grew from $350 billion in 2011 to over $4 trillion by 2026.
The final months of the Cook era were marked by the introduction of the M6 chip and the launch of the “iPhone Duo,” the company’s first foldable device. By November 2026, the number of active Apple devices worldwide reached 2.5 billion, supported by a Services segment that generated more than $100 billion in revenue during fiscal 2025.
1. Apple Watch and the Health Pivot
Originally launched in 2015 as a fashion-forward iPhone accessory, the Apple Watch evolved into a regulated medical tool. Key milestones included the introduction of ECG capabilities in 2018, followed by sleep apnea notifications in 2024 and hypertension alerts in 2025. This shift repositioned the wearable as an essential health monitor rather than a secondary screen.
2. Apple Silicon
In 2020, Apple began a foundational shift by replacing Intel processors with its proprietary M-series chips. This transition to Apple silicon was completed across the entire Mac lineup by 2023. The move gave Apple full control over its hardware and software integration, significantly improving battery life and thermal performance across the MacBook and iPad Pro lines. The M6 chip, released in late 2026, represents the latest iteration of this architecture.
3. AirPods and Hearing Health
AirPods moved beyond simple wireless audio to become a dominant category in the wearables market. By 2025 and early 2026, firmware updates and hardware refinements transitioned AirPods Pro into medical-grade hearing aids. This development allowed Apple to enter the audiology market, providing users with hearing assistance tools integrated directly into their existing consumer electronics.
4. The Services Ecosystem
A defining characteristic of Cook’s leadership was the aggressive expansion of recurring revenue through services. From iCloud and Apple Music to the 2019 launch of Apple TV+, the segment became a primary growth driver. By 2025, Services revenue reached $109 billion. This ecosystem created high user retention, as data and subscriptions became deeply embedded in the user’s daily life.
5. Apple Pay and Financial Services
Apple transformed the iPhone into a digital wallet through Apple Pay, eventually expanding into consumer banking. The introduction of the Apple Card and high-yield savings accounts leveraged the company’s massive user base to compete with traditional financial institutions. These features moved the iPhone from a communication device to a central component of personal financial management.
6. Vision Pro and Spatial Computing
The launch of the Vision Pro marked Apple’s entry into “spatial computing,” a category intended to succeed traditional mobile computing. While initially a niche high-end product, the platform established the software framework for augmented and virtual reality, signaling the company’s post-iPhone strategic direction.
7. iPhone Connectivity and the Foldable Shift
Connectivity evolved from standard cellular data to include 5G (iPhone 12) and Satellite Emergency SOS (iPhone 14). This trajectory culminated in the late 2026 release of the iPhone Duo. As the first foldable in the lineup, the Duo addressed a changing smartphone market while maintaining the software continuity established over Tim Cook’s 15-year tenure.
8. Apple TV+ and Original Content
Apple TV+ represented a major departure from Apple’s core competencies. The service achieved significant industry recognition, becoming the first streaming platform to win an Academy Award for Best Picture with CODA. By 2025, the service reached a record 81 Emmy nominations, validating Cook’s multi-billion dollar investment in original content as a means of ecosystem diversification.
9. AirTag and the Find My Network
The introduction of AirTag in 2021 expanded Apple’s reach into the physical world. By leveraging hundreds of millions of active devices to locate lost items, the “Find My” network turned the entire user base into a passive infrastructure for crowdsourced tracking, a utility that competitors struggled to replicate at the same scale.
10. Professional Camera Systems
Under Cook, the iPhone camera was repositioned as a professional-grade filmmaking tool. The introduction of Computational Photography, ProRAW, and ProRes video allowed Apple to capture a segment of the creative professional market that previously relied on dedicated DSLR and cinema cameras. This transformation helped maintain the iPhone’s premium pricing even as the global smartphone market matured.