After installing 3rd-party kexts in /Library/Extensions, or replacing vanilla kexts with patched kexts in System/Library/Extensions, you may want to repair their permissions and rebuild the kext cache to ensure they work as intented. Here's how.
In one of our previous articles we explained what are kexts and where they are stored . Here are a few different ways to install them. We also show how to repair permissions and rebuild the kext cache.