- Hold <kbd>option</kbd> key and click on Wi-Fi icon in menu bar. Third or Fourth from the top would be enable/disable Wi-Fi logging. 



- Open Airport Utility, Preferences and untick "Monitor AirPort base stations for problems". 

 https://support.apple.com/en-in/guide/aputility/aprt3fa98818/6.3.9/mac/10.15

- Open Wireless Diagnostics.app, go to Window Menu. I find Logs and Sniffer to be of interest. Click on Logs, Refresh for the sake of refresh and make sure that all of them are unticked.  Then restart.

[![enter image description here][1]][1]

 
 In Sniffer, "Start" would require admin password. Start and then stop. 

[![enter image description here][2]][2]

 
 http://osxdaily.com/2015/04/23/sniff-packet-capture-packet-trace-mac-os-x-wireless-diagnostics/


  [1]: https://i.sstatic.net/jjENO.png
  [2]: https://i.sstatic.net/I9vFh.png