Overview
- Apple released macOS Tahoe 26.5.1 on Monday, June 1, 2026, as a targeted maintenance update for the macOS Tahoe line.
- The update fixes an issue where Macs with the M5 chip could unexpectedly shut down when certain content‑filtering network extensions were active, a problem tied to managed corporate and school deployments.
- Apple’s release notes frame the patch specifically for enterprise users, so organizations that run M5 fleets with network filtering tools are advised to deploy the update quickly while most home users will see no visible changes.
- Users can install the update via System Settings → Software Update and must reboot to complete installation; at least one report lists the build as 25F80 and direct installer files are available for manual installs.
- macOS 26.5.1 continues a recent run of enterprise‑focused reliability fixes for M5 hardware and arrives days before Apple is expected to preview macOS 27 at WWDC 2026, reinforcing the company’s fast follow‑up on managed‑deployment issues.