I am having similar issues, though more detailed, I was in the ios9 beta and everything worked up until 9.1 release when I no longer could make phone calls immediately following the beta ios9.1 update, well I could, but everything including the dial sound was in Deep Throat sounding, did not matter whether calling out or incoming, same result, SO i took it to Apple to get wiped as it would not allow me to restore my phone on my iMac either. I am now on the new iOS 9.0.2 as of this morning and I lost MORE features which also seems to Coincide with El Capitan installation:
Several issues:
*Can NO longer make phone calls through my iMac, even though it says I can. the phone option disappears when selecting a contact or inputting a new one.
*When Texting is being used, my 'Text Short Cuts' that I Love, No Longer work ON the IMAC, but still work on the phone when texting. This also used to carry into my gmail account and that no longer is the case either. ***Note Everything worked fine with my IOS9 Beta but not after El Capitan update.
*Overall, the iPhone to iMac experience is now a 'IT Just DOESN'T Work' instead of 'it just works' NO LONGER THE CASE, Currently.
Also, Everything is slower that does work on the iPhone to IMac. definitely thinking ElCapitan is the issue.
Anyone else? I know there are a few other glitches