I followed steps in this post and tried to connect to my Motorola X Gen 2 for Wifi debugging, on OS X El Cap.
I connected my phone to the laptop with usb cable, I killed and started server, the server was started successfully, and then in:
./adb devices
I got
List of devices attached
TA44909GA0 device
Then I did
./adb tcpip 5555
And I tried
./adb connect <IP addr of my phone>:5555
both with usb cable connected and disconnected, none of them worked. Both returned error message saying:
unable to connect to ***.***.***.***:5555: Operation timed out
I cannot figure out what is happening here, I tried the Android Studio plugin ADB WIFI, which returned the same message, operation timed out. I restarted everything, tried connecting with a different cable and all, nothing worked.
Does anyone know what's happening here?
Make sure your computer and the android device are using the same wifi network. I had the same issue and fixed it after changing to the same wifi.