S1 used to connect to Wifi. Wifi is no longer working. I connect to S1 using USB cable, can configure Wifi on device and device successfully connects to network, with an allocated IP address. XCS fails to present device connection via Wifi as an option. Under connect a device, S1 does not appear. When trying to connect via IP address, same failure. I am using an Apple Macbook Pro, with latest version of XCS Tool software, and have upgraded firmware of S1 in developer mode successfully. 

Does anyone have any specific guide on how to resolve this?