I was reading some other articles. If you installed XCode, there is supposedly an option to link the Apple TV with Xcode 9, either wirelessly or via the Ethernet port.
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See this article for how to link Wirelessly.
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See [http://www.redmondpie.com/how-to-wirelessly-connect-apple-tv-4k-to-xcode-on-mac/|this article] for how to link Wirelessly.
I was reading some other articles. If you installed XCode, there is supposedly an option to link the Apple TV with Xcode 9, either wirelessly or via the Ethernet port.
See this article for how to link Wirelessly.