USB-C was supposed to be the one cable to rule them all. But different cables have different capabilities; telling them apart isn't easy. WhatCable is a free, open-source app for Macs will tell you what a cable can (and can’t) do.
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@dsilverman Found it on GitHub. https://github.com/darrylmorley/whatcable
@dsilverman Is there a different source for this app? The Houston Chronicle has a “Free Paywall” just give them your email address.