Apple rolls out fourth Release Candidates for macOS Sonoma 14.8.8 and Sequoia 15.7.8 [U]

Update July 7, 4:17 p.m. ET: Public betas are also now available.

After releasing a rare third RC for macOS Sonoma 14.8.8 and Sequoia 15.7.8 late last month, the company is now rolling out a fourth version alongside macOS 26.6 beta 4 and macOS 27 beta 3. Here are the details.

macOS Sonoma 14.8.8 and Sequoia 15.7.8 RC 4 now available

Developers can now install new RC builds of macOS Sonoma 14.8.8 (build 23J612) and Sequoia 15.7.8 (build 24G814), just a few days after Apple released the third release candidates for both systems.

As with macOS Sonoma 14.8.8 and Sequoia 15.7.8 RC 3, and the two releases before them, Apple doesn’t go into much detail about what these system updates include, other than the standard “This update provides important security fixes and is recommended for all users.”

Just last week, when Apple released iOS, iPadOS, and macOS 26.5.2, the company said the updates included security fixes originally slated for iOS 26.6 and its counterparts, adding that it decided to release them to the public earlier than anticipated due to the risks posed by new AI-powered tools.

So while it is currently unclear why Apple has issued four release candidates for an otherwise minor update, the company may be making last-minute changes to address newly identified security risks.

To learn more about Apple’s security releases, follow this link.

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