Open-source mac-mcp turns the ChatGPT chat window into a full Mac orchestrator via local MCP
bulutarkan · reddit · 2026-09-13
The author connected ChatGPT to a self-built local MCP server (mac-mcp, MIT licensed) so a normal chat can call local tools: shell, files, macOS UI, and Safari/Chrome—no Codex needed; the chat itself is the orchestrator, with Codex/OpenCode optional for subagents.
- Browser: works in a background Safari tab with a stable handle while you keep working elsewhere; supports both pixel-driving and structured browser/system tools.
- Hardening (after Reddit feedback): untrusted-web provenance, web-to-host trust gates, secret egress checks, tab leases, no-progress protection, audit events, adversarial tests; fixed Trusted mode nagging for "Allow Once" on harmless commands.
Repo: github.com/bulutarkan/mac-mcp. The chat now feels like a control plane for the machine rather than a box that tells you what to do next.
Related event: Open-Source Mac MCP Turns ChatGPT Into a macOS Controller(2 posts)→
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