Usr
The /usr folder stores Unix command-line tools, shared libraries, and other macOS components used by built-in utilities and many installed apps.
What is Usr?
The /usr folder is a core part of macOS and contains many of the Unix-style tools and shared resources that the operating system and applications use. It includes command-line programs, libraries, headers, and support files that help shell commands, developer tools, scripts, and background services run correctly. Users most often encounter /usr when working in Terminal, following development instructions, or checking where system commands are stored. Important subfolders such as /usr/bin, /usr/lib, and /usr/sbin are involved in everyday macOS functions even if you do not open them directly. This is system-level content rather than personal data, and changes to it can affect software behavior across the whole Mac.
Review files before deleting with diCleaner
Inspect caches, support files, folders, and related data before deleting items on Mac.
Safety overview
Status: Use with caution
This is a protected macOS system folder, not ordinary app data. Removing or modifying files inside /usr can break Terminal commands, developer tools, shared libraries, installers, and parts of macOS itself. Some subfolders may also contain components used by third-party software, so manual cleanup can cause wider problems than expected. Treat it as system-managed content and avoid deleting anything here unless you are following trusted platform-specific repair instructions and know the exact file involved.
Recommendation: Keep /usr intact. If you need to free space or troubleshoot software, remove user data, app caches, or unused applications instead of editing this folder. Only inspect or change a specific item in /usr when you have a clear reason and understand which tool or service depends on it.
File path
/usr
Share your experience
Be the first to share your experience.