Point update focuses on security fixes, stability—and a couple of noticeable UI repairs
THUNDER BAY – TECH – Apple has released macOS Tahoe 26.3, a maintenance update that’s light on new features but heavy on bug fixes and security patches. The update is now available through Software Update for compatible Macs.
No big new features—mostly fixes
Early reports indicate macOS 26.3 doesn’t add major new, user-facing features, but instead targets performance, stability and security.
Two user-visible fixes many Mac users will notice
While Apple’s public notes emphasize bug fixes and security, macOS 26.3 does address at least two interface problems introduced earlier in Tahoe’s “Liquid Glass” redesign:
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Easier window resizing: Apple adjusted resize “hit areas” so they better match rounded corners, improving reliability when grabbing window edges and corners.
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Finder column resizing restored: The update fixes an issue where Finder’s horizontal scroller interfered with the column width handle in Column View.
Security upgrades: dozens of vulnerabilities patched
Apple’s security advisory for macOS Tahoe 26.3 lists fixes across a wide range of components, including items that could allow data exposure, sandbox escapes, privilege escalation (including root), denial-of-service, and more.
One fix draws particular attention: Apple says a memory corruption issue in “dyld” was addressed, noting it has been linked to an “extremely sophisticated” targeted attack (reported by Google’s Threat Analysis Group).
Update vs. upgrade: what 26.3 actually is
Apple defines an update as a smaller release within the same macOS version (for example, Tahoe 26 → 26.3), while an upgrade is a major new macOS release with a new name. macOS 26.3 is an update, not a major upgrade.
How to install macOS 26.3
On your Mac:
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Open System Settings
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Click General
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Select Software Update
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Choose Update (or Restart Now if prompted)
Apple recommends backing up before installing updates.
If your Mac can’t run Tahoe 26
Apple is also shipping security updates for older macOS versions (including Sequoia and Sonoma) for Macs that aren’t eligible for Tahoe—important for households, schools, and businesses still running older hardware.
