I'm having problems with iPad tethered USB internet share (personal hotspot).
OS X 10.11. (15A226f) and iOS 9b (13A4325c)
Tethering via USB to iPads internet has worked before, but as far as I remember it stopped working after updating OS X to 10.11., so most likely the problem is NOT iOS 9, but the OS X 10.11
I'v already tried rebooting both devices, reconnecting everything etc., but nothing seems to work.
Best Answer
As this is an issue involving Beta Software, it should be reported to Apple via the Bug Reporter. Sign in with your Apple ID or developer account.
As to why: Check again your OS X Network settings.
Is there a fix: Perhaps with the next Beta release.