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macOS launchd PATH issue breaks AI agent tools silently

A common issue arises when running AI agent servers under macOS's launchd service, where the minimal PATH environment prevents necessary commands like 'uv' from being found. This leads to the AI model reporting that tools are unavailable, despite the agent process running correctly. The problem stems from launchd not sourcing the user's shell configuration, resulting in a restricted PATH that excludes directories like ~/.local/bin where many modern CLIs are installed. Attempts to fix this by restarting the agent or MCP server are ineffective because the core issue is the environment's PATH configuration, not a server crash. AI

IMPACT This issue highlights the need for careful environment management when deploying AI agents as services, impacting reliability and tool availability.

RANK_REASON The item describes a technical problem and solution for running AI agent servers on macOS, which is a specific tooling issue.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

macOS launchd PATH issue breaks AI agent tools silently

COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Bryan Clark ·

    launchd's minimal PATH breaks MCP servers: uv command not found

    <p>A stdio MCP server is just a subprocess. Your agent runtime runs something like<br /> <code>uv run my-mcp-server</code>, talks to it over stdin/stdout, and exposes its tools to<br /> the model. That works perfectly when you launch the agent from your terminal.<br /> Move the s…