Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Macos Mcp

🍎 macOS-MCP

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit ccebebd6ee33, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST INSTALL_DOCUMENTED_INSTALLER OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    src/macos_mcp/__main__.py, line 753 mkcert = subprocess.run(["which", "mkcert"], capture_output=True).returncode == 0

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    bridge/mcp-stdio-bridge.py, line 144 with urllib.request.urlopen(req, timeout=timeout) as resp:

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    CONTRIBUTING.md, line 11 - **UV Package Manager**: Install with `curl -LsSf https://astral.sh/uv/install.sh | sh` or `pip install uv`

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    uv.lock, line 1 version = 1

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    src/macos_mcp/__main__.py, line 753

    mkcert = subprocess.run(["which", "mkcert"], capture_output=True).returncode == 0

    src/macos_mcp/__main__.py, line 757

    install = subprocess.run(["mkcert", "-install"], capture_output=True, text=True)

    src/macos_mcp/__main__.py, line 763

    result = subprocess.run(

    Show more

    src/macos_mcp/__main__.py, line 778

    result = subprocess.run(

    src/macos_mcp/__main__.py, line 954

    return subprocess.run(["launchctl", *args], capture_output=True, text=True)

    src/macos_mcp/permissions.py, line 51

    result = subprocess.run(

    src/macos_mcp/permissions.py, line 129

    subprocess.run(

    src/macos_mcp/ax/core.py, line 1252

    subprocess.run(cmd, check=True, capture_output=True)

    src/macos_mcp/ax/core.py, line 1274

    os.remove(tmp_path)

  • Install and update

    Note

    The docs document an installer that pipes a download into a shell. README documents an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    CONTRIBUTING.md, line 11

    - **UV Package Manager**: Install with `curl -LsSf https://astral.sh/uv/install.sh | sh` or `pip install uv`

    README.md, line 53

    - **UV Package Manager**: Install with `pip install uv` or `curl -LsSf https://astral.sh/uv/install.sh | sh`

    manifest.json, line 6

    "long_description": "MacOS-MCP is a lightweight, open-source MCP server that bridges AI agents with the macOS operating system. It enables LLM agents to perform real-world tasks su

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    bridge/mcp-stdio-bridge.py, line 144

    with urllib.request.urlopen(req, timeout=timeout) as resp:

    bridge/mcp-stdio-bridge.py, line 187

    with urllib.request.urlopen(req, timeout=2) as resp:

    src/macos_mcp/ax/core.py, line 633

    # answered, and dropping them halves that fetch (6.88ms -> 3.22ms for 11

    Show more

    src/macos_mcp/desktop/service.py, line 288

    r = requests.get(url, timeout=10, headers=headers)

    src/macos_mcp/infrastructure/security.py, line 26

    """Raise ValueError if the URL is unsafe to fetch (SSRF protection).

  • Secrets

    Pass

    No read of a credential file or secret environment variable found.

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    uv.lock, line 1

    version = 1

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit ccebebd6ee33. can delete files. The docs document an installer that pipes a download into a shell. README documents an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: ccebebd6ee33cbd8260cdf08b067f1da91ecdc0b

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen