Extensions
/Library/Extensions stores kernel extensions used by macOS or installed hardware and security software to add low-level system features.
What is Extensions?
The /Library/Extensions folder contains kernel extensions, often called kexts, that extend macOS at a low level. These components may be installed by Apple, hardware vendors, security tools, VPN software, audio drivers, virtualization products, and other utilities that need deep system access. People usually encounter this folder when troubleshooting drivers, startup problems, compatibility issues after macOS updates, or leftover components from older software.
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Safety overview
Status: Use with caution
Items here can affect booting, hardware support, networking, security tools, and system stability. Removing the wrong extension can disable devices or software features, and some entries may belong to currently installed products even if their names are unfamiliar.
Recommendation: Do not delete items from /Library/Extensions just to free space. Review each extension carefully and keep anything tied to hardware, security, networking, or virtualization software you still use. If you suspect an old third-party extension is no longer needed, confirm the related app has been fully uninstalled and prefer the vendor's uninstaller or documented removal steps.
File path
/Library/Extensions
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