At its annual Worldwide Developers Conference in June 2025, Apple unveiled the most significant visual redesign of its operating systems in nearly a decade. iOS 26 and macOS Tahoe (version 26) introduce “Liquid Glass,” a revolutionary design language that transforms the look and feel of Apple devices while introducing powerful new AI capabilities through enhanced Apple Intelligence features.
Liquid Glass: A New Visual Language
Liquid Glass represents Apple’s most ambitious design overhaul since the introduction of iOS 7. The new aesthetic draws inspiration from the physical properties of glass, featuring translucent interfaces, fluid animations, and a sense of depth that makes digital elements feel tangible.
Key elements of the Liquid Glass design language include:
- Translucency layers: Interface elements feature variable opacity that responds to content beneath them
- Refraction effects: Light appears to bend realistically through interface components
- Fluid motion: Animations mimic the physical behavior of liquid and glass
- Depth hierarchy: Subtle shadows and lighting create clear visual layering
- Adaptive colors: Interface tints automatically complement wallpaper and content colors
“Liquid Glass creates a sense of materiality that makes technology feel more human,” explains Alan Dye, Apple’s Vice President of Human Interface Design. “It’s beautiful, but it’s also functional—the translucency provides context about where you are in the interface hierarchy.”
Enhanced Apple Intelligence
The new operating systems significantly expand Apple’s AI capabilities, bringing features that had previously required cloud processing directly onto devices. The Foundation Model API allows developers to run sophisticated AI models locally, enabling new categories of apps while preserving user privacy.
Major Apple Intelligence enhancements include:
- Live Translation: Real-time translation of conversations, text, and even signage viewed through the camera
- Contextual Awareness: Siri can now understand complex, multi-step requests that reference previous interactions
- Image Generation: On-device creation of images and emoji based on text descriptions
- Smart Summaries: Automatic summarization of long documents, emails, and web pages
- Predictive Actions: The system anticipates user needs based on context and offers relevant shortcuts
Siri’s Delayed Overhaul
Despite the significant AI improvements, Apple’s most anticipated feature—a complete Siri overhaul—has been delayed until 2026. The company acknowledged that internal testing revealed performance issues that didn’t meet Apple’s quality standards.
“We made the difficult decision to delay the new Siri rather than ship something that wasn’t ready,” said Craig Federighi, Apple’s Senior Vice President of Software Engineering. “Our users expect Siri to just work, and we weren’t confident the new architecture could deliver that experience consistently.”
The delay has drawn criticism from industry observers who note that Apple is falling behind Google and Amazon in voice assistant capabilities. Google’s Gemini-powered assistant and Amazon’s Alexa+ both offer more sophisticated conversational abilities than current Siri implementations.
Cross-Platform Unification
iOS 26 and macOS Tahoe bring Apple’s platforms closer together than ever before. The company has harmonized design elements, interaction patterns, and underlying frameworks to create a more cohesive ecosystem experience.
Universal Control has been enhanced to support up to six devices simultaneously, while Handoff capabilities now extend to virtually every application. A new “Universal Clipboard History” feature maintains a searchable history of copied items across all connected devices.
For developers, SwiftUI has received major updates that make it easier to build apps that work seamlessly across iPhone, iPad, and Mac. The new “Adaptive Layout” system automatically optimizes interfaces for any screen size or input method.
Privacy-First AI
Apple continues to differentiate itself from competitors through its privacy-focused approach to AI. Most Apple Intelligence features run entirely on-device, using the Neural Engine in Apple Silicon chips. When cloud processing is necessary, Apple’s “Private Cloud Compute” system ensures that data is never stored or accessible to the company.
“We believe that AI shouldn’t require users to compromise their privacy,” emphasized CEO Tim Cook during the keynote. “Our approach proves that powerful AI and strong privacy aren’t mutually exclusive.”
The Foundation Model API extends these privacy protections to third-party apps, allowing developers to offer AI features without sending user data to external servers.
Developer Response
Developer reaction to the new operating systems has been generally positive, though some express concern about the increased system requirements. Liquid Glass’s visual effects demand significant GPU resources, and older devices may experience performance degradation.
“The design is beautiful, but we’re going to have to be careful about performance on older hardware,” notes iOS developer Sarah Chen. “Apple’s recommended minimum specs have increased significantly, which could fragment the user base.”
The Foundation Model API has generated particular excitement among developers, who see opportunities to create entirely new categories of privacy-preserving AI applications. Early experiments include on-device language translation, offline image recognition, and personalized content recommendations.
User Adoption and Rollout
Apple has released developer betas of iOS 26 and macOS Tahoe immediately following the WWDC announcement, with public betas scheduled for July 2025. The general release is expected in September 2025, coinciding with the launch of new iPhone models.
Device compatibility extends back to iPhone 12 (2020) for iOS 26, though some Liquid Glass features require newer hardware. macOS Tahoe supports Macs with Apple Silicon chips (M1 and later), officially ending support for Intel-based Macs.
Competitive Landscape
The iOS 26 and macOS Tahoe announcements come as Apple faces increasing competition from Android and Windows. Google’s Android 16 and Microsoft’s Windows 12 have both introduced significant AI features, putting pressure on Apple to demonstrate leadership in this space.
While Liquid Glass gives Apple a distinctive visual identity, critics argue that the company is still playing catch-up in AI capabilities. Google’s Gemini integration offers more sophisticated language understanding, while Microsoft’s Copilot provides deeper productivity features.
“Apple’s design remains unmatched, but AI is becoming the primary battleground,” observes technology analyst Ben Thompson. “The Siri delay is concerning because voice interaction is a key interface for AI services.”
Looking Ahead
As the September launch approaches, Apple is working to address performance issues and refine the Liquid Glass implementation. The delayed Siri overhaul remains the elephant in the room, with expectations building for a 2026 release that must deliver significant improvements to maintain Apple’s competitive position.
For now, iOS 26 and macOS Tahoe represent an important evolution of Apple’s platforms—one that prioritizes visual beauty and privacy while laying groundwork for more substantial AI capabilities to come. Whether this approach satisfies users and maintains Apple’s market position will become clear in the months ahead.