Library
The /Library folder stores macOS system-wide resources, settings, support files, and shared data used by Apple software and installed apps for all users.
What is Library?
The /Library folder is a top-level macOS folder that holds shared resources used across the whole Mac. It contains system-wide application support data, fonts, preferences, logs, launch agents, extensions, caches, and other files that Apple software and third-party apps use for all user accounts. Unlike ~/Library, which belongs to one user, /Library affects the entire computer and can change how apps, services, and login items work for everyone. Many installers place shared components here so apps can run correctly, start background helpers, or store common assets. Users usually encounter /Library when troubleshooting software, managing enterprise settings, removing old support files, or checking startup behavior. Because this folder is part of normal macOS operation, it is best treated as shared system infrastructure rather than ordinary personal data.
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Safety overview
Status: Use with caution
Files in /Library are often required by macOS, device drivers, security tools, and apps installed for all users. Deleting items from this folder can disable launch agents, remove shared frameworks, reset app behavior, break fonts or plug-ins, or stop software from opening correctly. Some subfolders also control background services and login-related behavior, so changes can affect the whole Mac rather than just one account. If you plan to clean up /Library, remove only items you can clearly tie to an uninstalled app and leave Apple-created components and active vendor folders in place.
Recommendation: Keep /Library itself. If you need to free space or remove leftovers, review individual subfolders and target only specific files from apps you no longer use. Avoid bulk deletion, and make a backup before changing shared support files because mistakes can affect every user on the Mac.
File path
/Library
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