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Apple is all set to launch the much-anticipated iPhone 17 series on September 9. Rumors and speculations continue to grab headlines ahead of the big reveal. However, amid growing excitement, the tech giant has now dropped disappointing news for users. The company has officially stopped signing iOS 18.5, just days after the iOS 18.6 update rolled out on July 29.
This move means users can no longer perform an iOS downgrade to the 18.5 version, even if they downloaded and saved the previous update file. Apple’s server-side signing system has blocked it from passing verification, rendering iOS 18.5 unusable for any fresh installation.
By locking down older iterations, Apple keeps users on the most recent, secure builds, which is essential after an update with as many patches as iOS 18.6.
The first impression of 18.6 invokes memories of a lack of glam. However, a monumental update brings security and performance enhancements to the platform. A few significant changes that this update includes are:
Bug fix: Fixes a bug with the ongoing functionality of Memories within the Photos application.
Security fixes: It fixes more than 20 vulnerabilities, some of which could have allowed unauthorized code execution.
EU compliance: This regulation alters the behavior of third-party app stores for users in the European Union under the Digital Markets Act.
Performance tweaks: Better memory management and app response while optimizing background process execution.
The update addresses user-facing problems and improvements under the hood, and Apple has released a comprehensive security paper covering all the fixed bugs.
Users on older phones haven’t been forgotten either. For devices that don’t support iOS 18, Apple has rolled out iOS 17.7.9 with comparable security fixes. At the same time, iOS 17.7.8 has been unsigned, continuing the trend of discouraging downgrades to more insecure software.
This approach provides equal protection on every device, regardless of age.
With the update cycle on a roll now, all eyes are on Apple’s subsequent major hardware announcement, the iPhone 17 lineup. German telecom sources and trusted industry insider Mark Gurman report that Apple will host the launch event on Tuesday, September 9, 2025.
Pre-orders should commence on Friday, September 12, while official sales should start on September 19.
This year’s iPhone range may consist of four phones: iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max. The Air model, supposedly replacing the ‘Plus’ variant, is said to come with an ultra-slim build. Other anticipated improvements are the new A19 chip, revamped camera module, anti-reflective glass display, and thinner bezels.
Also Read: iPhone 17 Pro and iPhone 17 Pro Max: Prices, Features, Release Date, and More
By ceasing the signing of iOS 18.5 and 17.7.8, this Apple update intends all its users to be on secure and current software. Accordingly, the only option available now is to install iOS 18.6, which has over 20 security patches.
The move increased security while preparing the Apple ecosystem for another evolution, with the iPhone 17 series launch on September 9. This message could not be more straightforward: Stay updated, stay secure, and anticipate the coming days.
1. Why did Apple stop signing iOS 18.5 and 17.7.8?
Apple stops signing older versions to prevent downgrades and ensure all users stay on the latest, most secure software with recent patches and performance improvements.
2. What are the key features of iOS 18.6?
iOS 18.6 brings over 20 security fixes, improved Photos app stability, performance tweaks, and EU-specific changes for third-party app store compliance under the Digital Markets Act.
3. Can I install iOS 18.5 now if I have the file saved?
No, even with the file, iOS 18.5 can't be installed now as Apple’s servers won’t verify unsigned versions, rendering them unusable for fresh installs or restores.
4. What about older iPhones that can't run iOS 18?
Apple has released iOS 17.7.9 with similar security updates for unsupported devices, ensuring they remain protected despite lacking access to the latest iOS version.
5. When will the iPhone 17 be released?
Apple is expected to launch the iPhone 17 lineup on September 9, 2025, with pre-orders starting September 12 and retail availability beginning on September 19.
