WhatCable: Know what your USB-C cable can really do
www.whatcable.uk
Why is my MacBook charging slowly? WhatCable shows USB-C cable speed, charging power, and e-marker data in plain English. Free Mac app for Apple Silicon.
A free Mac utility that reads e-marker data from USB-C cables to display charging speed, data transfer rates, and power delivery information. The app translates technical specifications into plain-language summaries, removing guesswork for users troubleshooting slow charging or comparing cables. It runs natively on Apple Silicon and requires no technical expertise.
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- language
- EN
- here since
- July 2026