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tech 1 May 2026

Show HN: WhatCable, the Menu Bar App Simplifying USB-C Cable Inspection

WhatCable is a macOS app that identifies the exact capabilities of your USB-C cables. No more guessing what each cable can do!

Understanding the USB-C Cable Challenge

USB-C cables have become ubiquitous in our daily lives, whether for charging devices, transferring data, or connecting peripherals. However, not all USB-C cables are created equal. Some support fast charging, others can transfer data at high speeds, or transmit video signals. Identifying their specific capabilities can be a real headache, but WhatCable, a macOS app, simplifies this task.

What is WhatCable?

Developed by Darryl Morley, WhatCable is a menu bar app for macOS that tells you, in plain English, what each USB-C cable plugged into your Mac can actually do. It uses information from the USB-C chip to provide accurate details about each cable's capabilities.

Key Features

WhatCable offers several useful features:

  • Capability Identification: Whether it's compatibility with fast charging, high-speed data transfer, or video transmission, WhatCable provides all the necessary information.
  • Simple User Interface: The app is unobtrusive, seamlessly integrating into the macOS menu bar, and is easy to use.
  • Support for Multiple Cables: Whether you have one cable or several plugged in simultaneously, WhatCable can handle multiple connections at once.

Why It Matters for You

For developers, tech entrepreneurs, and professionals on the go, knowing exactly what each cable can do is crucial. You can optimize your workspace, avoid frustrations with using the wrong cables, and save time.

Real-World Examples

Take Sarah, a developer who frequently travels. Before using WhatCable, she often had to manually test her cables to ensure they would support fast charging for her MacBook. Now, with WhatCable, she can immediately identify the right cable, optimizing her efficiency.

How Does It Work?

The app utilizes data provided by the USB-C cable chips, which offer information on the cable's capabilities. WhatCable reads these and presents them to you in a simple, understandable format.

The Impact of WhatCable

Since its launch, WhatCable has gained popularity, with over 600 stars on GitHub. This app addresses a real need, simplifying the lives of many Mac users.

Conclusion

WhatCable is a powerful tool for anyone who regularly uses USB-C cables. By eliminating the guesswork around cable capabilities, it offers peace of mind and increased efficiency. So, what are you waiting for? Give it a try!

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