Some apps have AirPlay buttons built in that allow you to easily use AirPlay to stream from the app. If you see an icon of a rectangle with a triangle at the bottom, tap it and see if your AirPlay device appears. If it does, select it to start streaming or sharing.
First, if you see an icon in the menu bar near the top-right corner of your screen that looks like a rectangle with a triangle at the bottom, you’re all set up to mirror and can proceed to step 4. If not, click the Apple menu and select System Preferences. Click Displays. Select “Show mirroring options in menu bar. "
Some Mac apps, including Apple Music, have a built-in AirPlay button that allows you to use AirPlay from within the app. [1] X Research source In the case of Apple Music, click the triangle icon with three curved lines near the top-right corner to open a list of AirPlay-enabled speakers, and then click the speakers to start streaming. If you’re watching a streaming video in a web browser, you can often click an icon that looks like a rectangle with a triangle at the bottom to play it through AirPlay (the same icon that’s now in your menu bar). You may have to hover your mouse over the video or click it once to bring up the controls to find it.
To stop mirroring, click the icon again and select Turn AirPlay Off.
Click the Apple icon and select System Preferences. Click Sound. Select your AirPlay speaker under “Output. " If you want to switch back to your Mac’s onboard speakers, select “Computer. "
If this option is already selected, AirPlay is enabled for your Apple TV.
