Following the rollout of Apple’s 2027 system releases, the WebKit blog has published an in-depth look at what’s new with Safari 27.0. Chief among the new features is the Safari MCP server, which lets AI agents control the browser window to help developers work faster. To enable Safari MCP, developers must go to Safari > Settings > Developer and check “Allow remote automation and external agents.” Apple notes that the Developer pane only appears after users enable “Show features for web developers” under Safari > Settings > Advanced.

The Safari MCP server provides access to the DOM, network requests, screenshots, and console output. Your agent can see how your code renders, verify user states in forms, compare computed styles, test for accessibility issues, and analyze performance with navigation timing and resource load times. The MCP server runs entirely on your local machine, makes no network calls, and does not access personal information—Safari MCP sends captured data directly to the agent you’re running, not to Apple.

In addition to MCP support, Safari 27.0 fixes nearly 850 issues, up from the 525 fixes announced at WWDC, covering accessibility, CSS, encoding, fonts, forms, Math ML, networking, Web RTC, and more. It also introduces support for immersive environments in visionOS, expands the HTML <model> element to iOS, iPadOS, and macOS for embedding interactive 3D models, and adds Scroll Anchoring to prevent layout shifts. Web Inspector improvements include inline color-contrast information, better redirect-chain visibility, and enhanced layout debugging.

Updates span WebAssembly, WebGPU, JavaScript, CSS, WebRTC, media playback, Web Extensions, WKWebView, and Service Workers.