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title Install
description Get Copse running on a supported Mac, or build it from source.

Install

The supported app is macOS 26 or newer on Apple Silicon (arm64) and Intel (x64). Linux and Windows can run a source build for development. They are not supported release targets.

Signed download (when a release is published)

  1. Open the GitHub Releases page and download the DMG for your architecture.
  2. Open the DMG and drag Copse to Applications.
  3. Launch Copse. macOS Gatekeeper should accept a signed, notarized build.

If the download URL 404s or asks you to sign in, the repository is still private — use the source path below, or wait for a public release.

You should see the Copse window with a prompt to open a project folder.

If it does not launch, see Troubleshooting.

From source

You need Node.js 24 or newer and pnpm 10 (corepack enable; the repo pins pnpm@10.34.5). On macOS, install the Xcode command-line tools too.

git clone https://github.com/copse-dev/agent-pane.git
cd agent-pane
corepack enable
pnpm install
pnpm run dev

You should see an Electron window titled Copse. No paid model key is required: connect a local model, or launch with COPSE_PANEL_MOCK_LLM=1 pnpm run dev to opt into the built-in mock agent. An otherwise unconfigured app asks you to add a provider.

If pnpm install fails with No module named 'distutils', a newer Homebrew Python was selected for the native rebuild. Retry with the Python supplied by Xcode's command-line tools:

PYTHON=/usr/bin/python3 pnpm install

More install troubleshooting lives in the README and CONTRIBUTING.md.