Apple has released macOS Tahoe 26.5.1, a software update that fixes an issue causing unexpected shutdowns on some M5-powered Mac devices.
The update follows the rollout of macOS Tahoe 26.5 and addresses a bug affecting content-filtering network extensions used in enterprise environments. Apple said affected systems could unexpectedly power off when running specific network management tools.
According to Apple, the issue primarily impacted organizations that deploy content-filtering extensions to monitor and manage network traffic across company-owned devices.
Such tools are widely used by companies, educational institutions, and other enterprises to ensure that their security policies are followed and their Internet usage is managed. Unplanned crashes could hinder the functioning process.
Apple did not give any information about the number of affected users.
macOS Tahoe 26.5.1 is a bug-fix release with no new functionality. The update is intended to ensure system stability and reliability of systems using the mentioned configuration.
According to the update, this will fix the problem causing shutdowns, and those who qualify need to download it immediately.
The news also demonstrates Apple's dedication to its enterprise customers, with many companies now using Apple-issued M5-based computers for their businesses.
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This update can be installed using the Software Update option within the System Settings menu. It comes out well in advance of Apple’s annual developer conference, WWDC, during which the company makes more software releases. While it is not a major release, the bug fix included in this update could cause issues for business organizations using Apple Mac machines in a managed environment.