After Apple’s 2027 system updates were released, the WebKit blog released a detailed overview of the latest Safari 27.0 updates. Below are the key points.
Safari MCP Server Introduced as a Key Feature
Leading the new Safari 27.0 features is the Safari MCP server, which enables AI agents to take control of the browser window, speeding up development work.
To activate Safari MCP, developers should navigate to Safari > Settings > Developer and enable the “Allow remote automation and external agents” option. The Developer pane becomes visible only after turning on “Show features for web developers” in Safari > Settings > Advanced.
Apple explains that the Safari MCP server, now included in Safari 27.0, streamlines workflows for developers using AI agents. By granting tools such as Claude Code or Codex control over the browser, the agent can inspect how code renders. Safari MCP offers access to the DOM, network requests, screenshots, and console output, letting the agent handle tasks without the developer needing to switch windows, paste screenshots into the terminal, or type extensive prompts about issues.
The MCP server operates entirely locally on your machine, making no outbound network calls. It cannot access personal Safari data, and any captured information is sent only to the agent you run, not to Apple.
Apple’s blog also provides the exact commands needed to link Claude Code, Codex, or other agents to Safari, and encourages developers to give feedback and request new features.
Beyond MCP support, Safari 27.0 resolves nearly 850 bugs, an increase from the 525 fixes announced earlier at WWDC. These fixes cover accessibility, CSS, encoding, fonts, forms, MathML, networking, WebRTC, and many other areas.
Safari 27.0 adds support for immersive environments, enabling developers to deliver them in visionOS, and extends the HTML <model> element to iOS, iPadOS, and macOS, letting sites embed interactive 3D models directly on pages, similar to images or videos.
The article highlights the new Scroll Anchoring feature, which stops pages from shifting when, for example, an image loads above the visible area, and details Web Inspector upgrades such as inline color‑contrast info, clearer redirect‑chain visibility, and enhanced layout debugging.
The comprehensive list also covers enhancements and new capabilities in WebAssembly, WebGPU, JavaScript, CSS, WebRTC, media playback, Web Extensions, WKWebView, and Service Workers, and you can read the full article here.