macOS
brew install mscgenlocal Homebrew formula metadata
sudo port install mscgenMacPorts ports tree · graphics/mscgen/Portfile · source: api.github.com
brew
Parses Message Sequence Chart descriptions and produces images. Version 0.20 via Homebrew; verified 2026-06-13.
install
brew install mscgenlocal Homebrew formula metadata
sudo port install mscgenMacPorts ports tree · graphics/mscgen/Portfile · source: api.github.com
sudo apt install mscgenDebian stable package indexes · mscgen · source: deb.debian.org
sudo dnf install mscgenFedora Rawhide package metadata · mscgen · source: dl.fedoraproject.org
nix profile install nixpkgs#mscgennixpkgs package indexes · pkgs/by-name/ms/mscgen/package.nix · source: api.github.com
sudo zypper install mscgenopenSUSE Tumbleweed package metadata · mscgen · source: download.opensuse.org
overview
Parses Message Sequence Chart descriptions and produces images
history
mscgen is Michael McTernan's small Message Sequence Chart renderer and text language. The project page says it parses MSC descriptions and produces PNG, SVG, EPS, or server-side image-map output, with a syntax inspired by Graphviz DOT but simpler because sequence charts do not require general graph layout. It is written in ANSI C, uses the GD graphics library for PNG output, and is licensed under GPLv2.
Its adoption came through documentation tooling as much as standalone diagram generation. Doxygen 1.5.2 added `\msc` and `\endmsc` support after McTernan experimented with custom Doxygen modifications, letting developers embed MSCs alongside source-code documentation in a way similar to DOT diagrams. The project page also lists packaging for distributions and integrations or extensions for AsciiDoc, Sphinx, LaTeX, Org-mode, TWiki, and JIRA. In practice, mscgen fits the Unix-documentation niche: keep diagrams as reviewable text, render them in builds or docs, and use a smaller tool when Msc-generator's broader GUI and multi-chart feature set is unnecessary.
security posture
broad file, network, media, or database tool signal.
blue risk · medium confidence · tool
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
mscgen | cli | global executable |
freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
https://www.mcternan.me.uk/mscgen/
install metadata
| Package key | brew:mscgen |
|---|---|
| Version | 0.20 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/mscgen |
| Homepage | https://www.mcternan.me.uk/mscgen/ |
| Repository | https://code.google.com/p/mscgen |
| Upstream docs | https://www.mcternan.me.uk/mscgen |
| License | GPL-2.0-or-later |
| Source archive | https://www.mcternan.me.uk/mscgen/software/mscgen-src-0.20.tar.gz |
| Last updated | 2026-06-13T23:35:05+02:00 |
| Pulse | updated |
| Dependencies | freetype, gd |
| Build dependencies | pkgconf |
| Bottle | available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | mscgen |
| Version Scheme | 0 |
| Revision | 4 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
mscgen 0.20-16
Message Sequence Chart (MSC) generator
https://www.mcternan.me.uk/mscgen/
sudo apt install mscgenmscgen
nix profile install nixpkgs#mscgenmscgen 0.20-15
Message Sequence Chart (MSC) generator
https://www.mcternan.me.uk/mscgen/
sudo apt install mscgenmscgen-dbgsym 0.20-15
debug symbols for mscgen
sudo apt install mscgen-dbgsymmscgen 0.20-43.fc44
Message Sequence Chart rendering program
http://www.mcternan.me.uk/mscgen/
sudo dnf install mscgenmscgen 0.20-3.29
Message Sequence Chart Renderer
http://www.mcternan.me.uk/mscgen/
sudo zypper install mscgenmscgen
sudo port install mscgensource trail
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View the package source record on GitHub.