The free web debugging proxy for any browser, system or platform.
The macOS version (220.127.116.11161) is expired and has not been updated in over 2 months.
There is new version available on the download page - 18.104.22.16865. It has been uploaded on Jan 6th. Isn't this what you download?
I see what the problem is. The label on the Fiddler download page failed to update. We'll fix that. Still what gets downloaded is the new version so, please, update.
You won't be notified about changes to this idea.