I use a MacBook Pro with Catalina and the WebIDE to flash an connect to Espruino BLE devices without problems.
@MaBe started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I use a MacBook Pro with Catalina and the WebIDE to flash an connect to Espruino BLE devices without problems.