And another one. Installed 11.1.5 yesterday and can no longer AirPlay to my Apple TV.
The Airplay icon illustrated by sburman was present initially but greyed out for Apple TV. Foolishly I unticked Apple TV and the AirPlay Icon dissappeared.
Prior to 11.1.5 Apple TV would also appear under Sound Output tab in System Preferences and even was selected by the OS as the default output instead of built-in speakers. Now Apple TV does not appear there either. It's as if it didn't exist to this machine.
So I have done all the router reset, power cycle routines to no help. I have re selected/passworded the network on AppleTV and MacBook Pro (OS 10.9.2) and turned off then on Home Sharing to force new password authentication in iTunes and Apple TV.
Annoyingly both my iPhone and iPad do offer the AirPlay option and when selected it works!! I can AirPlay.
So Airplay within the network does work just iTunes 11.1.5 on my OSX 10.9.2 Mac Book Pro. Do Apple read this and register a problem or do I have to make a support request?
Thanks for anyone who "knows" how to fix