Monitor your Wi-Fi connection not found on High Sierra Your Mac can monitor your Wi-Fi connection for intermittent issues, such as dropped connections.

Well I know that and used it before, but can not find it on High Sierra.

The output looked like this 



If Wireless Diagnostics finds an issue, it stops monitoring and shows a brief description of the issue. 



So where is this wonderful tool on High Sierra.

Just to make it clear..I am not looking for this 160MB WirelessDiagnostics_C02W92Z5J1WL_...tar report. It is loaded with files no normal human can understand.
I believe that it can be found in /System/Library/CoreServices/, but I'm not sure what it will be named in High Sierra, maybe Network Diagnostics.app