I fire up Fiddler Everywhere on my Mac. Generally, it appears to do nothing.
In further detail, "Stream" and "Decode" can be toggled, but otherwise do nothing. The connections icon has a hover-over describing my host and states I have a network connection. The help icon goes to the very limited documentation via browser. The settings icon pops open the settings dialog, which does appear to save changes, but not impact the "nothing" being done by the application. The capture button and inspectors button appear to do nothing. The main viewing area states "No records available." The area to the right of the main area states "Please, select a single Web Session to inspect." And that is it.
Either I'm doing (or not doing) something dumb, or it just isn't working for me. Any help would be appreciated :)
Mac specs: High Sierra 10.13.6, 2.6GHz i7, 16 GB memory