Wireless debugging was recently added as a feature in Xcode 9, iOS 11, and tvOS 11. Apple TV 4K doesn't have a USB port, so it requires wireless debugging. How do you perform this wireless debugging in Xcode?
from help.apple.com
Debug your app running on an iOS or tvOS device over a Wi-Fi or other network connection.
Check that your device has a passcode and add one if it doesn't. Your device must have a passcode to enable remote debugging
The Mac and the iPhone/iPad need to be on the same network to use wireless debugging.
Next, in Xcode
Xcode pairs with your device. If Xcode can connect with the device using a network, a network icon appears next to the device in the left column.
Now you are ready for debugging over the network.
Sometimes it doesn't work. You might need to restart the device or network connection.
Note: Network debugging requires Xcode 9.0 or later running on macOS 10.12.4 or later, and on the device, requires iOS 11.0 or later, or tvOS 11.0 or later.
Make sure your Mac and your Apple TV are on the same network.
Choose Window > Devices and Simulators, then in the window that appears, click Devices.
On your Apple TV, open the Settings app and choose Remotes and Devices > Remote App and Devices.
The Apple TV searches for possible devices including the Mac. (If you have any firewall or Internet security, disable/turn it off to allow searching.)
On your Mac, select the Apple TV in the Devices pane. The pane for the Apple TV is displayed and shows the current status of the connection request.
Enter the verification code displayed on your AppleTV into the Device window pane for the device and click Connect.
Xcode sets up the Apple TV for wireless debugging and pairs with the device.