macOS Tahoe 26.3.1 (a)
Background Security Improvement fixes WebKit vulnerability CVE-2026-20643. Studio Display support. New M5 Macs announced.
BSI Update: March 17, 2026 · macOS 26.3.1: March 4, 2026
⚠️ Important: macOS Tahoe 26 is the final macOS version to support Intel Macs. Future versions will require Apple Silicon.
Follow our step-by-step guide to update your Mac to the latest version safely.
How to UpdateSee what's new, what's fixed, and what's changed in the latest macOS release.
View Release NotesStuck on "Preparing Update" or encountering errors? We can help.
Troubleshooting GuidesApple deploys BSI update fixing critical WebKit vulnerability CVE-2026-20643 that could allow Same Origin Policy bypass attacks.
Update adds support for new Studio Display and Studio Display XDR, ships pre-installed on new M5 MacBook Air and MacBook Pro models.
Apple patches actively exploited zero-day vulnerability CVE-2026-20700, adds Liquid Glass interface options and enhanced parental controls.
Complete step-by-step guide to safely update your Mac to the latest version.
Learn how to create a bootable macOS USB drive for clean installations.
Troubleshoot stuck updates, installation errors, and other common issues.
Background Security Improvement · WebKit vulnerability CVE-2026-20643 fix preventing Same Origin Policy bypass
Feature Update · Studio Display & Studio Display XDR support, ships with new M5 MacBooks
Critical Security Update · Patches CVE-2026-20700 zero-day exploit, Liquid Glass UI enhancements
Security Update · Important patches for all compatible Macs
Security Update · Essential security improvements