Rustup
The ~/.rustup folder stores Rust toolchains, components, and metadata installed by rustup for Rust development on your Mac.
What is Rustup?
rustup is the standard toolchain manager for the Rust programming language. The ~/.rustup folder typically contains installed Rust compiler versions, standard libraries, components such as rustfmt or clippy, and metadata that rustup uses to manage updates and active toolchains. People usually encounter this folder after installing Rust for software development, building Rust-based projects, or using developer tools that depend on Rust.
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Safety overview
Status: Mostly safe
This is usually not a system-required folder. Removing it generally does not harm macOS, but it can break Rust development workflows and may remove installed toolchains, components, and configuration managed by rustup. Projects that expect Rust or cargo toolchains to be available may stop building until rustup is reinstalled or reconfigured.
Recommendation: Keep it if you use Rust, cargo, or any developer tools that depend on Rust toolchains. If you no longer do Rust development and do not need the installed toolchains, it is usually reasonable to remove ~/.rustup after confirming you do not need your current Rust setup.
File path
~/.rustup
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