WhatCable: Free Mac tool reveals real USB-C cable performance
The Verge reviews WhatCable, a free Mac app for Apple Silicon that reads data exposed by macOS to show exactly how each USB-C cable performs—speed, power, and potential bottlenecks—by querying the cable’s e-marker and the Mac’s port controller; the app is free at core (with a Pro upgrade for additional diagnostics) and a Linux port is in development.