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                      OS 26.0.1 Updates Fix Early Bugs

   Adam Engst

   Apple has released small updates across its operating system lineup to
   fix early bugs that came to light after the official launch of the
   OS 26 upgrades:
     * [1]macOS 26.0.1: Apple says that the update resolves the issue that
       prevented some users from upgrading to Tahoe on the M3 Ultra Mac
       Studio (see '[2]macOS 26 Tahoe Won't Install on the M3 Ultra Mac
       Studio,' 17 September 2025). That took a bit longer than I
       expected.
     * [3]iOS 26.0.1:This update fixes Wi-Fi and Bluetooth dropouts on the
       iPhone 17, iPhone Air, and iPhone 17 Pro, suggesting an issue with
       Apple's new N1 wireless chip. It also resolves a problem that
       prevented some iPhone users from connecting to a cellular network
       after upgrading to iOS 26. The newly released iPhone models also
       apparently had an issue with artifacts in photos taken under
       certain lighting conditions; Apple has now squashed that bug.
       Additionally, the update corrects a problem that caused app icons
       to appear blank after applying a Liquid Glass tint. Finally, it
       addresses an issue that caused VoiceOver to become disabled for
       some users after updating to iOS 26.
     * [4]iPadOS 26.0.1:Besides fixing the VoiceOver bug, iPadOS 26.0.1
       also prevents the floating keyboard from unexpectedly changing
       positions.
     * [5]watchOS 26.0.2:watchOS is slightly out of step with the others,
       due to a 26.0.1 update exclusively for the Apple Watch Ultra 3. The
       release notes don't specify what changed in either version beyond
       the usual 'bug fixes and important security updates.'
     * [6]tvOS 26.0.1: It addresses an issue where audio could be out of
       sync on certain video streaming apps.
     * [7]visionOS 26.0.1: Apple hasn't yet updated the online release
       notes.

   Some of these updates also fix a single vulnerability in FontParser,
   where processing a maliciously crafted font on a Mac, iPhone, iPad, or
   Vision Pro could lead to unexpected app termination or corrupt process
   memory. Operating systems updated specifically to address this
   vulnerability include:
     * [8]macOS 26.0.1 Tahoe
     * [9]macOS 15.7.1 Sequoia
     * [10]macOS 14.8.1 Sonoma
     * [11]iOS 26.0.1 and iPadOS 26.0.1
     * [12]iOS 18.7.1 and iPadOS 18.7.1
     * [13]visionOS 26.0.1

   If you have already upgraded to the OS 26 versions of any of these
   operating systems, I recommend installing the updates immediately'the
   bug fixes are helpful, even if the FontParser vulnerability doesn't
   require urgent action. Those still using earlier versions of macOS,
   iOS, and iPadOS should install security updates at their convenience;
   the vulnerability isn't being exploited in the wild.

References

   1. https://support.apple.com/en-us/122868
   2. https://tidbits.com/2025/09/17/macos-26-tahoe-wont-install-on-the-m3-ultra-mac-studio/
   3. https://support.apple.com/en-us/123075
   4. https://support.apple.com/en-us/123074
   5. https://support.apple.com/en-us/123002
   6. https://support.apple.com/en-us/106336
   7. https://support.apple.com/en-us/123024
   8. https://support.apple.com/en-us/125328
   9. https://support.apple.com/en-us/125329
  10. https://support.apple.com/en-us/125330
  11. https://support.apple.com/en-us/125326
  12. https://support.apple.com/en-us/125327
  13. https://support.apple.com/en-us/125338

.