The error typically occurs on macOS when attempting to install Graphviz via Homebrew . It is often triggered by outdated developer tools, broken Homebrew links, or system-level incompatibilities on older macOS versions. Core Reasons for the Error
librsvg is a library used to render SVG images into other formats. If its own dependencies (like Rust or Cairo) cannot be fetched, the parent Graphviz installation fails. Step-by-Step Solutions 1. Reset Xcode Command Line Tools error graphviz failed to download resource librsvg
Homebrew requires a specific set of tools to compile and install dependencies like librsvg . If these are outdated or the path is misconfigured, the download or build process fails. The error typically occurs on macOS when attempting
Attempting to install the failing resource manually can provide more detailed error logs and bypass the Graphviz-specific trigger. Run: brew install librsvg . If this succeeds, try brew install graphviz again. 4. Use MacPorts (Alternative for Older OS) If its own dependencies (like Rust or Cairo)
Remove existing tools: sudo rm -rf /Library/Developer/CommandLineTools . Reinstall them: xcode-select --install .
Older versions (like 10.15 Catalina or older) are often no longer supported by modern Homebrew formulae, leading to dependency failures.
If Homebrew continues to fail—especially on an older Mac—MacPorts is a reliable alternative that often supports legacy hardware better. Download MacPorts for your OS version. Update the database: sudo port selfupdate . Install Graphviz: sudo port install graphviz . Why Graphviz Needs librsvg Too much dependencies on mac brew? - Help - Graphviz