WhatCable: macOS Menu Bar App for USB-C Cable Inspection
Original: Show HN: WhatCable, a tiny menu bar app for inspecting USB-C cables
Why This Matters
Addresses widespread USB-C cable compatibility confusion in Mac ecosystem
Developer releases WhatCable, an open-source macOS menu bar application that identifies USB-C cable capabilities in plain English. The app uses macOS IOKit to surface information about connected cables, helping users understand charging speeds and data transfer capabilities.
WhatCable is a small macOS menu bar utility that displays detailed information about connected USB-C cables, addressing the confusion around varying cable capabilities that look identical externally. The app provides per-port analysis showing whether cables support Thunderbolt/USB4, USB devices, charging only, or slow USB connections. It includes charging diagnostics to explain why Macs might charge slowly. The tool leverages macOS's existing IOKit framework to surface technical information in user-friendly language, helping distinguish between basic USB 2.0 charge-only cables and high-performance 240W/40Gbps Thunderbolt 4 cables. The project is open-source and available on GitHub, targeting the common user frustration of not knowing USB-C cable capabilities without testing.