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Apple rolls out fourth developer and public RCs for macOS Tahoe 26.7 and macOS Sequoia 15.8

2026-09-09 | original

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Why This Matters

Apple has pushed a fourth round of Release Candidates for macOS Tahoe 26.7 (build 25G229) and macOS Sequoia 15.8 (build 24H23), signaling that public releases are days away. Both are maintenance updates centered on bug fixes, performance, and security rather than new features, which matters for Mac users who should patch promptly. The multiple RC rounds also hint at Apple refining fixes before shipping.

Key Takeaways

macOS Tahoe 26.7 and Sequoia 15.8 hit their fourth RCs, with public releases expected within days.
Both updates focus on bug fixes, performance, and security rather than new user-facing features.
Apple says AI-assisted security research has accelerated its security fixes, making prompt updating advisable.

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New Release Candidates for macOS Tahoe 26.7 and macOS Sequoia 15.8 are available to developers and users in the public beta program. Here are the details.

macOS Tahoe 26.7 and macOS Sequoia 15.8 get new RCs

As soon as Apple wrapped up its “Surprise and Shine” event, where it announced the iPhone Duo, iPhone 18 Pro, and iPhone 18 Pro Max, Apple rolled out RC builds for macOS Tahoe 26.7 and macOS Sequoia 15.8.

macOS 26.7 is light on new user-facing features and focuses instead on bug fixes and performance improvements. The same goes for macOS Sequoia 15.8.

Thanks to improvements in AI-assisted security research, Apple has been able to speed up security fixes over the past few months. For this reason, it’ll likely be a good idea to update your Mac as soon as these systems become available officially in the next few days.

The new Release Candidate build for macOS Tahoe 26.7 is 25G229, while the build for macOS Sequoia 15.8 RC 4 is 24H23.

For 9to5Mac’s full coverage of Apple’s “Surprise and Shine” event, follow this link.

Did you spot anything new in today’s RCs? Let us know in the comments.

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