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Murmur is now open source under GNU GPL version 3 only (GPL-3.0-only). Version 0.2.4 (6) replaces the proprietary preview license and removes the separate contributor agreement for new contributions.
You can use, study, modify, share and sell Murmur under the GPL. Distributed modified versions must provide corresponding source and preserve the same freedoms for recipients. Private modifications do not have to be published. Dependencies and optional model weights retain their own licenses; the separate branding policy does not limit GPL use, forks or resale.
Download and install
Download Murmur-0.2.4-arm64.dmg, open it, and drag Murmur into Applications. Requires Apple Silicon and macOS 26 or later. The app is Developer ID signed and Apple-notarized. It preserves the signing requirement used in 0.2.3, preferences and downloaded models. Model downloads remain explicit and separate.
This is a licensing and distribution update. Dictation, microphone isolation, Quick Talk ending capture and focused-editor paste behavior are unchanged. This is still an early app; remaining hands-on checks are documented.
Source and build instructions
- Download the matching first-party source archive, including application code, tests, build scripts and lockfiles.
- SOURCE.md: build/install instructions and the pinned Swift/native dependency sources. Third-party source access is provided through these exact upstream revisions, alongside the first-party source archive.
- GPLv3 license and third-party notices. These documents and source directions are also readable offline in Help → Licenses & Credits and on the DMG.
Both installer and source archive have attached SHA-256 checksum files. Source access is public and free, without an account. Keep the source directions beside the installer when redistributing it. Historical 0.2.3 and earlier installer files retain their original bundled terms.
Validation: default Swift checks pass, with three optional model/file checks skipped. Archive/export, Apple notarization, stapling, strict signatures, Gatekeeper, the 79 third-party notices/four package pins, bundled root documents and DMG verification pass. The DMG was installed and the native app's version and bundled GPL text were checked. No new human dictation retry is claimed for this licensing-only release.
Report a bug with the version/build, Mac/macOS, microphone, speech engine and reproduction steps. Remove private dictated text from reports.