Rumors for macOS 27 (codenamed “Project Big Bear”) suggest that while the “Liquid Glass” design language debuted in macOS 26 Tahoe, this year’s update is all about refinement, accessibility, and a massive overhaul for Siri.
Here is what the rumor mill is pointing toward for Monday’s WWDC 2026 keynote:
The “Liquid Glass” Evolution
Following the radical visual redesign in macOS 26, macOS 27 is expected to be a “Snow Leopard” style update, focusing on stability and polishing the new look rather than tearing it down again.
- Accessibility First: Rumors suggest Apple is prioritizing “Liquid Glass” accessibility, making the glass-like transparency and depth effects more legible for users with vision impairments.
- Touch Optimization: There is heavy speculation about a more touch-friendly interface specifically for the MacBook Pro line, hinting at future hardware changes or better integration with iPadOS features.
- Unified UI: Expect further tightening of the design language across Mac, iPhone, and iPad to ensure that buttons, menus, and “glass” layers feel identical across all three platforms.
Siri 2.0: The AI Powerhouse
The biggest change coming to macOS 27 is undoubtedly the transformation of Siri from a voice assistant into a full-scale AI chatbot.
- Standalone Siri App: For the first time, macOS will reportedly feature a dedicated Siri app. It is expected to look and act like ChatGPT or Claude, with a message-style interface, a “history” sidebar of past conversations, and a file attachment icon for analyzing PDFs and images.
- On-Screen Awareness: Siri will supposedly gain the ability to “see” what is on your screen. You could ask it to “Summarize the document I’m looking at” or “Send the photo Eric just sent me to my work group,” and it will understand the context without you needing to specify the file.
- Cross-App Actions: Rumors suggest Siri will finally be able to perform complex tasks between apps, like taking a chart from a Numbers spreadsheet and inserting it into a Keynote presentation or a Mail draft.
- Siri Extensions: In a major shift, Apple may allow rival chatbots (like Gemini or Claude) to integrate directly into Siri. You could choose which “engine” powers your queries through a new marketplace in the App Store.
Names and Timeline
While “macOS 27” is the technical version, two names are leading the pack for the marketing title:
- macOS Big Bear: Based on leaked “hashflag” filenames found on X (Twitter).
- macOS Emerald: A reference to Emerald Bay at Lake Tahoe, signaling that this is a refined “plus” version of the previous Tahoe update.
Note: Because macOS 27 is the first version to drop Intel support entirely, many of these “Siri 2.0” features are expected to be Apple Silicon exclusives, relying on the Neural Engine in M-series and A-series chips.
