macOS Tahoe 26.4 Update! Is it Finally Time to Upgrade?

Overview

• Video cover: macOS “Tahoe” 26.4 — the .4 mid-cycle “big” release, presented as the last major Tahoe update before WWDC 2026.
• Host tested 26.4 daily on an older supported machine (2019 16” Intel MacBook Pro) and performed a Time Machine restore to evaluate stability and behavior.
• Main recommendation: If you’re already on Tahoe, 26.4 is recommended (bug fixes + many security patches). If you’re on Sequoia or Sonoma, the presenter is more cautious/undecided.

What’s included (OS-wide and cross-platform)

• Synchronized platform updates:
  • macOS Tahoe 26.4
  • macOS Sequoia 15.7.5
  • macOS Sonoma 14.7.5
  • iOS / iPadOS 26.4 (and iOS 18.7 for older devices)
  • watchOS updates (including fixes for older watchOS activation)
  • HomePodOS, tvOS, visionOS
  • Studio Display firmware
  • Safari 26.4
  • Xcode / Command Line Tools 26.4
• Safari WebKit fixes are delivered both inside Tahoe and as separate Safari updates for Sequoia/Sonoma.

Key features and UX changes in macOS Tahoe 26.4

• AirPods Max 2 support
  • H2 chip features (adaptive audio, live translation) supported on macOS.
• New emoji
  • Eight additional emoji added.
• Safari
  • Compact tabs option restored with improved interface and full‑screen behavior.
• Freeform
  • Integrated into Apple Creator Studio with advanced image creation/editing tools and a premium content library for Creator Studio members.
  • Still works as a standalone app if not enrolled in Creator Studio.
• Reminders
  • Ability to mark reminders as urgent via keyboard shortcut.
  • “Urgent” filter available in smart lists.
  • UI tweaks, including new “Mark as Completed” action/shortcut.
• Purchase Sharing
  • Adult family‑sharing members can use their own payment methods for purchases (no longer require the family organizer’s card).
• Automatic update behavior
  • macOS may toggle automatic software update options during the upgrade (often defaults to download/install).
  • Users must re‑disable settings if they prefer not to have automatic updates.
  • A Background Security Improvements (BSI) auto‑install option is added under Privacy & Security — it can be disabled, but installs modify the system build version.
• Camera / remote‑management indicator
  • New onscreen circle indicator: green for camera in use, purple for remote viewing/management.
  • Behavior demonstrated when locking the screen.
• Terminal safety dialog
  • Paste‑to‑Terminal warning dialog blocks potentially dangerous pasted commands and advises caution (appears initially; likely a one‑time detection).
• Battery / charging improvements
  • Slow charger notification: macOS identifies under‑watt chargers and flags “Slow Charger” in the battery menu (based on recommended wattage for the model).
  • Last charge info: shows the time and percentage of the last charge.
  • Charging limit setting: user‑definable charge cap (e.g., 80%) to extend battery lifespan; shows “on hold” when the limit is reached.
    • Note: the charging limit is available only on Apple silicon Macs (not on Intel Macs).

Security and enterprise

• Security fixes
  • 67 security vulnerabilities patched in 26.4, including seven WebKit fixes.
  • Reminder: apply Safari updates on Sequoia/Sonoma to get the WebKit fixes there.
• Enterprise / MDM changes
  • Rosetta apps: users are notified when launching apps that require Rosetta and that such apps won’t open in a future macOS release.
    • Admins can suppress these notifications via device management.
    • Apple confirmed Rosetta support will continue through macOS 27.
  • Fixes for prior enterprise issues:
    • Printers removed after updates.
    • Wi‑Fi icon missing on M5 erases.
    • Managed app sign‑in prompts (Keynote/Numbers/Pages) addressed.

Firmware and installers

• Apple silicon firmware updated (new mboot / OS loader / BridgeOS/T2 firmware build numbers).
• Full installer and DFU/PSW restore images are available (presenter provides direct Apple links on his site).

Practical notes, tests, and how‑tos shown in the video

• Update size inconsistency
  • Reported update sizes vary widely (speaker saw ~18.0 GB from 26.3.1; community reports 7–18.86 GB).
  • Viewers were asked to report their update sizes.
• Demoed items
  • Compact tabs toggling and visual difference.
  • Freeform under Creator Studio UI and features.
  • Reminders edits and keyboard shortcuts.
  • How automatic updates are re‑enabled during upgrade and where to change settings (Software Update → choose “Download only” / toggle security/system data/BSI).
  • Camera indicator behavior when screen locked (green → purple).
  • The paste‑to‑Terminal blocked warning behavior (likely only shown initially).
  • Charging limit setting and slow charger notification; demonstrated that Intel Macs lack the charging limit control.
• Advice for users with unsupported Macs using OpenCore/legacy patches
  • Be careful — automatic updates may re‑enable and can break unsupported setups.
  • Recommended using profiles/tools to block updates if needed.

Verdict and outlook

• 26.4 is positioned as a “make‑or‑break” release for Tahoe: it delivers numerous bug and security fixes plus useful features.
• The presenter recommends updating if you’re already on Tahoe.
• Speculation about macOS 27: hope for an Apple‑silicon‑focused, stability‑first release with improved reliability, battery life, memory behavior, and core OS tasks (Spotlight/search, performance).

Sources and speakers

• Main presenter: Mr. Macintosh (video host).
• Primary sources referenced: Apple release notes & support documentation, MacRumors (slow‑charger support doc mention), Apple developer/enterprise notes, and the presenter’s own tests and Twitter posts.