Home » News » Apple Stops Signing iOS 18.6.2 & iOS 26 – No More Downgrades!
🗓️ September 25, 2025, By ✍️ Karly Wood
Apple has officially stopped signing iOS 18.6.2, which means iPhone and iPad users can no longer downgrade from newer versions of the operating system. This move locks users onto the latest iOS release and is part of Apple’s standard update strategy.
Why Apple Stops Signing Older iOS Versions
Apple typically stops signing older versions of iOS shortly after a new update is released. The company does this to:
Ensure security: Older versions may contain vulnerabilities.Maintain stability: Apple wants most users on the latest builds.Encourage adoption: By removing downgrade options, more people stay on current updates.What This Means for Users
If you recently updated to iOS 26, you cannot roll back to iOS 18.6.2. This is especially important for users who:
Face performance issues on the latest update.Prefer jailbreaking (since older versions are often more jailbreak-friendly).Experience app compatibility issues after updating.What Does iOS 18.6.2 (Unsigned IPSW) Mean?
When Apple releases an iOS update (like iOS 18.6.2), each version comes with a firmware file called an IPSW (iPhone Software file). These IPSW files can be used to install or restore iOS on your iPhone or iPad through Finder (on Mac) or iTunes (on Windows).
But here’s the catch: Apple doesn’t allow you to install just any IPSW file. Instead, each IPSW must be signed (approved) by Apple’s servers in real time during installation.
Signed vs Unsigned IPSWsSigned IPSWApple is still approving that version.You can install or downgrade to it without issues.Unsigned IPSWApple has stopped approving it.Even if you have the file, you cannot install or downgrade to that version.iTunes/Finder will throw an error because Apple’s servers reject it.Why Apple Unsigned iOS 18.6.2
Apple stopped signing iOS 18.6.2 once newer updates rolled out (iOS 26.0.1 and beyond). This means:
Jailbreak users lose an opportunity to return to a jailbreak-compatible version.
You cannot downgrade to iOS 18.6.2 anymore.
If you’re already on a newer version, you’re stuck there.
Q&A: Everything You Need to Know
Q1: Can I downgrade my iPhone now?
No. Once Apple stops signing an iOS version, you cannot officially downgrade using iTunes or Finder.
Q2: Why does Apple block downgrades?
Apple does this to protect users from vulnerabilities in older software and to encourage a consistent ecosystem.
Q3: What if I saved SHSH blobs?
If you have SHSH blobs for iOS 18.6.2, you may still be able to downgrade using advanced tools. However, this process is complex and not for the average user.
Q4: Does this affect all iPhones?
Yes, all devices that previously supported iOS 18.6.2 and iOS 26 are now restricted from downgrading.
Q5: What’s the best option if I don’t like the new update?
You’ll need to wait for Apple’s next release, as downgrading is no longer possible through official means.
Bottom Line
Apple shutting down iOS 18.6.2 and iOS 26 signing means one thing: once you update, there’s no going back. Users are now encouraged to stay on the latest iOS builds for the best security, stability, and performance.