I cannot figure out how to get the airplay icon to display on my 13" 2010 macbook pro.

Model Name: MacBook Pro

Model Identifier: MacBookPro7,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.4 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache: 3 MB

Memory: 4 GB

Bus Speed: 1.07 GHz

Boot ROM Version: MBP71.0039.B0B

SMC Version (system): 1.62f7

All software is up to date.