At the Worldwide Developers Conference on June 10, 2024, Apple unveiled macOS Sequoia, the twenty-first major iteration of its desktop operating system. The release follows the company’s tradition of naming macOS versions after California landmarks, with Sequoia taking its name from Sequoia National Park in the Sierra Nevada mountain range.
It succeeds macOS Sonoma. Development and testing commenced immediately, with the first developer beta becoming available on the same day as the announcement. Developers gained early access to begin optimizing their applications.
A public beta followed on July 15, 2024, allowing a broader audience to test the software and submit feedback before the official release. After several months of refinement, macOS Sequoia launched on September 16, 2024.
This date marked a notable milestone in Apple’s history, as it coincided with the release of new versions of iOS and iPadOS. It was the first instance of all three operating systems—macOS, iOS, and iPadOS—being made available to users on the same day, reflecting Apple’s strategy to synchronize its software ecosystem for a more unified user experience across devices. Beyond its feature set, macOS Sequoia carries significance for its hardware implications. It is the final version of macOS to support several older Mac models.
These include the iMac Pro, the 2019 iMac, most Intel-based MacBook Pros (excluding the 2019 16-inch model and the 2020 13-inch model with four Thunderbolt 3 ports), the 2018 Mac Mini, and the 2020 Intel MacBook Air. Additionally, macOS Sequoia is the last release to support Macs lacking Apple’s T2 security chip, as well as any Intel-based MacBook Airs and Mac Minis.
The T2 chip integrates the system management controller, audio controller, and SSD controller while providing enhanced security features. Apple’s successor to Sequoia, macOS Tahoe, was released on September 15, 2025. Tahoe drops support for all the models that Sequoia was the last to support, indicating a shift toward newer hardware and potentially more stringent system requirements.
This transition underscores Apple’s focus on security and hardware modernization. With macOS Sequoia now succeeded, users and developers are turning attention to future developments.
The discontinuation of support for older machines in Tahoe suggests that owners of those models may need to consider upgrading to newer devices to access the latest security updates and features. As Apple continues to advance its operating systems, the balance between innovation, security, and device support will remain a key factor shaping the future of the macOS ecosystem.
