Extensions
/System/Library/Extensions contains macOS kernel extensions and driver components that support hardware and low-level system features.
What is Extensions?
Extensions in /System/Library/Extensions are Apple-provided kernel extensions, also called kexts, that help macOS communicate with hardware and provide low-level system capabilities. People may encounter this folder when reviewing disk usage, troubleshooting startup or hardware issues, or investigating older driver-related components on versions of macOS that still use kernel extensions.
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Safety overview
Status: Use with caution
This is a protected system location. Its contents are closely tied to macOS booting, hardware support, networking, storage, and other core functions. Removing or altering items here can cause instability, missing hardware features, startup problems, or require reinstalling macOS.
Recommendation: Keep this folder and its contents intact. Do not manually delete items from /System/Library/Extensions. If you are troubleshooting a driver or extension issue, review related third-party software and use supported macOS troubleshooting steps instead of modifying system files.
File path
/System/Library/Extensions
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