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How can I mirror my MacBook Air screen wirelessly onto my lg tv
MacBook Air, macOS High Sierra (10.13.2)
About AirPlay and Airplay Mirroring
AirPlay Mirroring requires a second-generation Apple TV or later, and is supported on the following Mac models: iMac (Mid 2011 or newer), Mac mini (Mid 2011 or newer), MacBook Air (Mid 2011 or newer), and MacBook Pro (Early 2011 or newer).
Several Apple Articles Regarding AirPlay
You can, if you have something like the Apple TV. Apple support document:
Use AirPlay to display video from your Mac on an HDTV - Apple Support
How can I mirror my MacBook Air screen to my lg tv screen
