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Apr 12, 2001
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Apple has stopped signing iOS 18.6.2, which means that if you've upgraded to iOS 26, you're no longer able to downgrade to a version of iOS 18. Apple released iOS 26 a week ago.

iOS-26-on-iPhone-Feature.jpg

When software is "signed," it means that it has passed a server-side verification check that Apple performs when a new version of iOS is downloaded on an iPhone. An update can't be installed unless it passes the verification check.

Unsigning software prevents Apple customers from installing outdated, less secure versions of iOS.

Apple isn't forcing users to install iOS 26, and there is an option to continue using iOS 18, but once a device has been upgraded to iOS 26, there's no going back.

Apple has also stopped signing iPadOS 18.6.2 and tvOS 18.6, so there's also no downgrade option available for iPads.

Article Link: Apple Stops Signing iOS 18.6.2, iOS 26 Downgrades Now Impossible
 
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Reactions: SFjohn
What are you talking about, there’s iOS 18.7 to downgrade to…?
Yeah was going to say this as well
Forgive my ignorance, but why can’t you downgrade to 18.7?
Um, the current version of iOS 18 is 18.7. I don’t see why it would be impossible to revert.
18.7 still being signed
There is no IPSW file for 18.7 for devices that support 26. So, you would need to downgrade to 18.6.2 then update to 18.7 OTA. That path is now gone
 
Forgive my ignorance, but why can’t you downgrade to 18.7?

Um, the current version of iOS 18 is 18.7. I don’t see why it would be impossible to revert.

Because in order to revert to a previous version, you need to do it using the IPSW file on a Mac. And Apple never provides an IPSW for the .7 version, which is released at the same time as the new .0 version, Apple only provides an OTA update.

No IPSW, no downgrade possible, and no clean installs of the .7 version either.
 
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