Apple has officially released macOS Tahoe 26.0.1 on September 29, 2025, bringing important bug fixes and security updates to Mac users. This marks the first maintenance update since the debut of macOS Tahoe earlier this month.
Key Fix: M3 Ultra Upgrade Bug
One of the most significant issues addressed in this release is a bug that prevented Mac Studio models with the M3 Ultra chip from upgrading to macOS Tahoe. With version 26.0.1, those devices can now successfully install the new operating system without encountering installation failures (source: MacRumors).
Security and Stability Improvements
Beyond the M3 Ultra fix, Apple notes that macOS Tahoe 26.0.1 includes:
- Security patches addressing vulnerabilities discovered since the initial 26.0 release.
- Stability improvements to ensure smoother performance across supported Macs.
- Compatibility enhancements, especially for systems upgrading from macOS Sequoia or Sonoma.
Apple has not yet disclosed the full list of Common Vulnerabilities and Exposures (CVEs) patched in this release, but the update is recommended for all users to maintain system security.
How to Update
To install macOS Tahoe 26.0.1:
- Open System Settings.
- Go to General > Software Update.
- If your Mac is eligible, you’ll see the update available for download.
It’s best to back up your Mac before updating, especially if you’re upgrading from an earlier macOS version.
Why It Matters
This update is particularly important for early adopters of Apple’s M3 Ultra Macs, ensuring they can take full advantage of macOS Tahoe’s new features. For all other users, it delivers behind‑the‑scenes improvements that strengthen the system’s reliability and security.
