Since updating to OSX Mavericks, my airplay icon is missing
Since updating to OSX Mavericks my airplay icon is missing from my IMac (3.06GHZ). However, it is present and working completely appropriately on my Macbook Pro with Retina display. Both have the same OSX, Apple TV is fully updated. I have reset my computers, appleTV, routers, iTunes multiple times, but it's just my IMac that is having the problems displaying the Airplay icon. Not sure what else can be done or why one computer works while the other doesn't when the settings are otherwise the same. Airplay worked on it without problem before the patch.
iMac, OS X Mavericks (10.9)