07.08.2025
Several unreleased Apple Silicon chips recently surfaced in an internal build of iOS 18, including A19, M5, and C2, according to exclusive information provided to AppleInsider.An early build of iOS

An early build of iOS 18 revealed Apple's next-gen chip identifiers. Image Credit: Aaron (researcher) / YouTube printscreen
On July 3, AppleInsider exclusively shared a list of device identifiers that correspond to more than a dozen unreleased Mac configurations, many of which are set to feature variants of Apple's soon-to-be-announced M5 chip. Following our report, we were made aware of an internal build of iOS 18 with references to multiple unannounced Apple Silicon chips for a variety of hardware platforms.
The operating system, which bears the build number 22A91871y, is a NonUI variant of iOS 18. As such, it lacks the standard consumer-oriented iOS user interface, instead featuring only rudimentary applications designed primarily for hardware testing.
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