Apple has seeded the release candidate version of macOS Sequoia 15.6 for public beta testers and developers, allowing them to test the upcoming update before its official release. The macOS Sequoia 15.6 beta can be downloaded through the Software Update section of the System Settings app.
While details on the new features in macOS Sequoia 15.6 are scarce, it marks a significant step towards the end of Apple’s work on this operating system as they focus on the upcoming macOS Tahoe release.
Meanwhile, iOS 26 is expected to arrive in public beta soon, according to Bloomberg. The update is rumored to include Adaptive Power Mode, which should provide full-day battery life for devices like the iPhone 17 Air.
Apple is also preparing to announce its new iPhone models this September, with rumors suggesting a thinner iPhone 17 Air and several new features, including improved CarPlay capabilities. Additionally, watchOS 26 will be released in a couple of months, bringing new features to compatible Apple Watch models.
Source: https://www.macrumors.com/2025/07/21/apple-seeds-macos-15-6-rc