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.kext file installed improperly and cannot be used

If you see this error, after an update or rebuild of your system....

The system extension "/System/Library/Extentions/IO80211Family.kext/Contents/Plugins/AirPortAtheros. kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

Check to confirm the permissions on the kext file and all of the files inside.

1. open hard drive > System > Library > Extensions
2. Find the extension in question
3. Right click on the kext file > Show Package Contents
4. Change permissions
Owner = System (read/write)
Group = wheel (read only)
Guest = (read only)
5. repeat and confirm for ALL files within the Package Contents (try using 'apply privis to enclosed')

"kext" means kernel extension; similar to "extensions" in OS 9.

MacBook Pro, G4 Tower, MDD Tower, iMac, iBook, TiBook, SE/30, Vaio laptop, Mac OS X (10.5.5)

Posted on Nov 24, 2008 2:03 PM

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.kext file installed improperly and cannot be used

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