Airplay icon does not show up on menu bar
I have a MacBook Pro late-2011 and a brand new Apple Airport Express. The Airplay icon shows up on iTunes, but not in the menu bar of the Mac. I tried to "detect display", doesn't work. How can I make it work to use mirroring?
FYI, I have Mac OS X Yosemite 10.10, and Airport Utilities software is up to date...
Thanks!
MacBook Pro, OS X Yosemite (10.10)