Native Chromium Mac preview — no VM setup

Native macOS Chromium development preview for Apple silicon. No Linux ISO or guest desktop is required.

• Download FocusBrowser-arm64-development.zip for the complete compiled app (~145 MB), or the source ZIP to build locally. Follow the repository README.
• Binary built from 6db0da5 on GitHub macOS 26 ARM64; source kit includes subsequent documentation and report-preservation changes, with identical browser code.
• Actual Mac build, launch and page rendering passed. A 20-cycle confirmed Finder/browser study recorded 432 focused/visible observations with no focus/blur/visibility-change events. A real engine-focus-loss negative control detected blur.
• Raw observations: https://github.com/Sipper1236/focus-isolation/tree/main/docs/evidence/native-mac-38662037693
• Build and study: https://github.com/Sipper1236/focus-isolation/actions/runs/38662037693

This is preliminary evidence, not completed acceptance or a commercial product. Genuine input, normal navigation/login flows, ClickClickClick and full A–D on the physical M4 remain required. No user input was fabricated. The privacy indicator remains unverified.

Ad hoc development signing only: no Developer ID signature or notarization. Gatekeeper may block the downloaded app; build from source locally instead of disabling protections. Licensing is not implemented. Performance, lifecycle, sandbox enforcement and production security remain unverified.