# macos-mcp-server MCP Server

Control macOS system settings, apps, windows, audio, displays, screenshots, and Focus mode via MCP.

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## Status

Pod has not dialled macos-mcp-server yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

## Connect

Published as `@cyanheads/macos-mcp-server` on npm. Runs locally.

## Known issues

**13 problems reported by people outside the maintainer team.** Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 10.

### Most discussed

### bug(multiple tools): raw CLI command strings leak into error messages

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

Several tool handlers surface raw `execFile` error messages directly to the agent, leaking internal CLI invocations (command path + arguments). The errors also lack `reason` codes and recovery hints, making them non-actionable.

Affected cases:

| Tool | Input that triggers it | Leaked command |
|:-----|:--------

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/4) · 2026-05-25 · closed · 2 comments

### bug(macos_take_screenshot): target=window always fails on macOS 26.1 — ObjC.deepUnwrap(CGWindowList) returns null entries

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

`macos_take_screenshot` with `target=window` always returns `window_not_found` even for apps that are clearly running and have visible windows. Tested with Finder, Code (VS Code), and ghostty — all fail.

The window-capture flow uses JXA with `ObjC.import('CoreGraphics')` and `$.CGWindowListCopyWindowInfo($.kCGWi

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/3) · 2026-05-25 · closed · 2 comments

### bug(macos_manage_windows): minimize action fails with "Can't convert types" on macOS 26.1

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

`macos_manage_windows` with `action=minimize` always fails with an `osascript` execution error, regardless of the target app. Tested with Finder and ghostty — both return the same error.

The `minimize` case executes `win.minimized = <bool>` via the `buildFindWindowScript` helper, which sets the `minimized` prope

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/2) · 2026-05-25 · closed · 2 comments

### bug(macos_control_audio): SwitchAudioSource -f dict flag not supported in v1.2.2, breaking list and switch_output/switch_input

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

Bun 1.3.11

### Transport

HTTP (Streamable HTTP)

### OS

macOS 26.1

### Description

`macos_control_audio` with `action=list`, `switch_output`, or `switch_input` always returns an `InternalError` (`-32603`). The `macos://audio/devices` resource also fails with the same error.

`AudioService.listDevices` calls `SwitchAudioSource -a -f dict` to get structured output, but the `-f` flag (format selec

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/1) · 2026-05-25 · closed · 2 comments

### bug(macos_get_info): fully-charged battery on AC renders as "on battery"

`macos_get_info` renders `— on battery` for a machine that is fully charged and running on AC, contradicting the `Power Source: AC` line printed directly beneath it.

## Reproduce

On a laptop plugged in and topped up (`pmset -g batt` reports `charged`, not `charging`):

```
pmset -g batt
Now drawing from 'AC Power'
 -InternalBattery-0 (id=22675555)	100%; charged; 0:00 remaining present: true
```

Call `macos_get_info` with no arguments. `content[0]`:

```
### Power
**Battery:** 100% — on batter

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/6) · 2026-08-22 · closed · 1 comment

### Most recent

### bug(macos_get_info): Wi-Fi reported disconnected when Location Services gates the SSID

`macos_get_info` and `macos://system/info` report `wifi: {ssid: null, connected: false}` on a machine that is associated with a network. The server is collapsing "cannot read the SSID" into "not connected".

## Reproduce

Call `macos_get_info` on a Mac joined to a Wi-Fi network:

```json
"wifi": { "ssid": null, "connected": false }
```

Ground truth on the same machine:

```
$ system_profiler SPAirPortDataType
  Current Network Information:
    PHY Mode: 802.11ax
    Network Type: Infrastructure

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/10) · 2026-08-22 · open · 0 comments

### bug(macos_manage_finder): trash on a nonexistent path throws InternalError instead of path_not_found

`macos_manage_finder action=trash` with a path that does not exist fails as an unclassified `InternalError` carrying the raw AppleScript, instead of the `path_not_found` the tool declares. The `reveal` action pre-checks the same path and returns the typed error correctly.

## Reproduce

```json
{"action": "trash", "path": "/zz/no/such/path/qx.txt"}
```

Returns `-32603 InternalError`:

```
osascript failed: 29:72: execution error: Finder got an error: Handler can't handle objects of this class. 

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/9) · 2026-08-22 · open · 0 comments

### bug(macos_control_volume): set with no level and no muted silently no-ops and reports success

`macos_control_volume action=set` called with neither `level` nor `muted` does nothing and reports success. The result is indistinguishable from a set that took effect.

## Reproduce

```json
{"action": "set"}
```

Returns, with no `isError`:

```json
{"level": 56, "muted": false}
```

Nothing was changed. `56` is the volume that was already in effect.

## Cause

The handler falls through all three branches without writing anything, then reads the current state back and returns it as the result.

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/8) · 2026-08-22 · open · 0 comments

### bug(macos_manage_apps): quit reports success for an app that isn't running

`macos_manage_apps action=quit` reports `success: true` for an application that is not running. The sibling actions `force_quit`, `hide`, and `show` all pre-check the process list and correctly return `not_running` for the same input.

## Reproduce

```json
{"action": "quit", "app_name": "ZzNonexistentAppQx"}
```

Returns, with no `isError`:

```json
{"action": "quit", "success": true, "app_name": "ZzNonexistentAppQx"}
```

The same name through `force_quit`, `hide`, or `show` returns `-32001` w

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/7) · 2026-08-22 · open · 0 comments

### feat(macos_control_music): add Apple Music transport control tool

The server controls system output volume (`macos_control_volume`) and audio device routing (`macos_control_audio`), but has no playback control for the Apple Music app. Add a `macos_control_music` tool that drives Music.app via AppleScript (`tell application "Music"`) through the existing `osascript-service` — rounding out the macOS media surface alongside volume and audio.

## Proposal

A single `macos_control_music` tool exposing transport verbs and now-playing reads for the Apple Music app. P

[Read the thread](https://github.com/cyanheads/macos-mcp-server/issues/5) · 2026-06-15 · open · 0 comments

[See all 13 reports Pod holds for macos-mcp-server](/mcp/macos-mcp-server/issues).

## Firsthand observations

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