Apple has released iOS 18.6.1, bringing stability improvements, critical security patches, and a key enhancement for Apple Watch users in the U.S. While attention is on iOS 26 betas, this update ensures your device stays secure and fully functional.

How to Update to iOS 18.6.1

You can update your device over-the-air (OTA) by navigating to: Settings > General > Software Update

If the update doesn’t appear immediately, Apple’s rollout may take a few hours to reach all users.


What’s New in iOS 18.6.1

The update includes:

  • Critical security updates to protect your device
  • Bug fixes and behind-the-scenes improvements for performance and stability
  • Redesigned Blood Oxygen feature for Apple Watch (U.S. only):
    • Available for Apple Watch Series 9, Series 10, and Apple Watch Ultra 2 paired with iPhone running iOS 18.6.1
    • Sensor data is now measured and processed on the iPhone
    • Results can be viewed in the Respiratory section of the Health app
    • Enabled due to a recent U.S. Customs ruling
  • No impact on Apple Watch units already featuring the original Blood Oxygen functionality or units purchased outside the U.S.

Download iOS 18.6.1 IPSW Files

You can manually restore or update your device using the appropriate IPSW file via Mac (Finder) or PC (iTunes).

iOS 18.6.1 IPSW Download Links

iPhone ModeliPhone Model
iPhone 16 Pro MaxiPhone 16 Pro
iPhone 16 PlusiPhone 16
iPhone 15 Pro MaxiPhone 15 Pro
iPhone 15 PlusiPhone 15
iPhone 14 Pro MaxiPhone 14 Pro
iPhone 14 PlusiPhone 14
iPhone 13 Pro MaxiPhone 13 Pro
iPhone 13 miniiPhone 13
iPhone 12 Pro MaxiPhone 12 Pro
iPhone 12 miniiPhone 12
iPhone 11 Pro MaxiPhone 11 Pro
iPhone 11iPhone XS Max
iPhone XSiPhone XR
iPhone SE (3rd Gen)iPhone SE (2nd Gen)
iPhone 16e

Important Notes for Manual IPSW Installation

  • Always back up your device via iCloud or Finder before restoring
  • Ensure you download the correct IPSW for your model
  • IPSW restores erase the device unless using update mode:
    • Mac: Option + Click
    • Windows: Shift + Click

Final Thoughts

iOS 18.6.1 update may appear minor, but the update delivers essential security improvements and enables the new Blood Oxygen measurement experience for eligible Apple Watch users in the U.S. Installing it keeps your iPhone and paired Apple Watch fully optimized and ready for the latest features.

Categorized in:

Apple, iPhone, News,

Last Update: August 14, 2025

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