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Apple to Overhaul Operating Systems with Unified Versioning at WWDC 2025; Major AI Upgrades Postponed

The conference shift highlights Apple’s emphasis on ecosystem unity, with developer access to on-device AI ahead of Siri upgrades in 2026.

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Overview

  • Apple will unveil a cohesive redesign for iOS, macOS, watchOS and tvOS, aligning interfaces and icons across all platforms.
  • All main operating systems will switch to a single numbering scheme—iOS26, macOS26 Tahoe, watchOS26 and tvOS26—to simplify software updates.
  • Developers will gain access to Apple’s on-device AI models, and users can expect new AI features for battery management and AirPods translation.
  • Key advancements for Siri and broader Apple Intelligence have been deferred to WWDC 2026 as Apple recalibrates its AI roadmap.
  • iOS26 is scheduled for public release in September 2025, with older devices such as the iPhone XR, XS and XS Max losing update eligibility.