Hello!
I installed Mountain Lion and have a 15" MBP late 2010.
And unfortunately there are no AirPlay-symbol in the menu bar. :-(
I found this thread while searching for eventually hacks! 🙂
Please tell me if you come up with anything! 🙂
Kind regards
John Norrby
MBP 15", 2,66 ghz, i7, 128 gb ssd, 8 gb ram
iPhone 4, 16 gb
iPad (3 gen), wifi + 3g, 64 gb
Apple TV (2 gen)
Apple AirPort Extreme