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macOS Tahoe Release History

Comprehensive changelog, security updates, and enterprise deployment notes for the macOS 26 lifecycle. Information curated for IT administrators and power users.


macOS Tahoe 26.5.2
Build: 25F84
Released: June 29, 2026

Overview: A security-focused update addressing approximately 29 vulnerabilities across the Kernel, WebKit, IOGPUFamily, and libxslt. Fixes were backported from the ongoing macOS 26.6 beta cycle. Recommended for all users immediately.

Security Updates
  • IOGPUFamily (CVE-2026-43743): A race condition was addressed with improved state handling, preventing an app from causing unexpected system termination.
  • Kernel (CVE-2026-43724): Addressed with improved input sanitization; an app could previously cause unexpected system termination or write to kernel memory.
  • Kernel (CVE-2026-43722): Addressed with improved input sanitization, preventing an app from leaking sensitive kernel state.
  • Kernel (CVE-2026-39868): Addressed with improved input validation, preventing an app from causing unexpected system termination or corrupting kernel memory.
  • libxslt (CVE-2026-43706): A double-free issue was fixed with improved memory management, preventing malicious web content from causing an unexpected process crash.
  • WebKit: 19 WebKit vulnerability fixes addressing issues including arbitrary code execution, CSP bypass, and use-after-free crashes.
Admin Note: This update contains backported security fixes from the 26.6 beta cycle. Apple accelerated this release to preempt AI-assisted exploit development. Immediate deployment is strongly recommended for all managed fleets. Supersedes macOS 26.5 (25F71).
macOS Tahoe 26.5
Build: 25F71
Released: May 11, 2026

Overview: A major update delivering security patches, a significant Safari update (security content published May 13), and stability improvements. Superseded by macOS 26.5.2.

Safari 26.5 Security Content
  • 14 WebKit CVEs: All security patches in this Safari update target WebKit (and one WebRTC). Impacts include: CSP enforcement bypass, sensitive user data disclosure, process crashes via use-after-free, and malicious iframe download-settings abuse. (CVE-2026-43660, 28907, 28962, 43658, 28905, 28847, 28904, 28955, 28903, 28953, 28902, 28901, 28913, 28883, 28958, 28917, 28947, 28946, 28942, 28971)
  • Available for: macOS Sonoma and macOS Sequoia (standalone Safari update for older macOS). Safari on iOS 26.5, iPadOS 26.5, and visionOS 26.5 is included with those OS updates.
  • 63 Bug Fixes: Improvements to Scroll-driven animations, Anchor Positioning, WebRTC, networking, and rendering at different zoom levels.
  • CSS :open Pseudo-class: Consistent styling for the open state of <details>, <dialog>, <select>, and <input> elements.
  • CSS random() Updates: element-scoped keyword for per-element randomness; caching updated to global-by-default per spec.
  • SVG & Web APIs: color-interpolation for SVG gradients, ToggleEvent.source for popovers, and the Origin API.
Security Updates
  • System Security: Addressed multiple vulnerabilities that could lead to arbitrary code execution, including WebKit and Kernel patches.
  • Stability Improvements: Resolves system instability issues and improves overall device performance.
macOS 26.4
Build: 25E246
Released: March 24, 2026

Overview: Important security update providing crucial vulnerability patches and system enhancements recommended for all users.

Security Updates
  • System Security: Addressed multiple vulnerabilities that could lead to arbitrary code execution (CVE fixes).
  • Stability Improvements: Resolves system instability issues and improves overall device performance.
macOS 26.3.1
Build: 25D2128
Released: March 4, 2026

Overview: Minor update providing crucial bug fixes and enabling support for the Studio Display and Studio Display XDR.

macOS 26.3
Build: 25D125
Released: February 11, 2026

Overview: The third major point release for macOS Tahoe focuses on window management and Safari enhancements.

New Features
  • Window Management: Fixes sticky edge behavior in Stage Manager.
  • Safari: Web profiles can now have distinct dock icons.
  • Enterprise Config: Updates to MDM protocol for declarative device management.
macOS 26.2
Build: 25C56
Released: December 12, 2025

Overview: Stability and performance focus for the winter cycle.

Key Updates
  • Gaming Mode: Enhanced performance priority for game porting toolkit compatibility.
  • Finder: "Smart Folders" now support regex-based filtering.
  • Freeform: Infinite canvas performance improvements for large boards.
macOS 26.1
Build: 24B71
Released: January 22, 2026

Overview: A stability-focused release addressing early bugs from the initial 26.0 launch.

macOS 26.0
Build: 24A345
Released: September 15, 2025

Overview: The massive annual update bringing major new features and ecosystem enhancements.