e' una "svista" di Apple nell'estensione "AppleUSBEthernetHost.kext" installata con l'aggiornamento di iTunes.
O la sostituisci con la versione vecchia presa da un backup, o la correggi.
Personalmente, sono entrato in /System/Library/Extensions/AppleUSBEthernetHost.kext/Contents e ho eliminato tre link simbolici "farlocchi":
CodeDirectory
CodeRequirements
CodeSignature
L'istruzione da terminale è:
sudo rm /System/Library/Extensions/AppleUSBEthernetHost.kext/Contents/Code*
Oppure puoi divertirti a farlo dal Finder.
This fixes it.
You are basically removing ( or renaming as I did) the old kext and then rerunning the iTunes installer which will then properly install the kext.
http://blog.iphoting.com/blog/2012/09/04/fixing-broken-iphone-usb-tethering-on-os-x (http://blog.iphoting.com/blog/2012/09/04/fixing-broken-iphone-usb-tethering-on-os-x)
To fix the faulty AppleUSBEthernetHost.kext, it needs to be reinstalled from the iTunes package. Follow the steps below:
Unplug your iPhone from the computer.
Download the iTunes installer (http://www.apple.com/itunes/download/ (http://www.apple.com/itunes/download/)).
Remove the old kernel extension:
$ sudo rm -Rf /System/Library/Extensions/AppleUSBEthernetHost.kext
Run the iTunes installer and let it finish.
Load the updated kernel extension:
$ sudo kextload /System/Library/Extensions/AppleUSBEthernetHost.kext