whatcable-macos-usb-inspector
WhatCable macOS USB-C Inspector
Skill by ara.so — Daily 2026 Skills collection.
WhatCable is a macOS 14+ menu bar app (Swift/SwiftUI) that reads IOKit services to surface what each USB-C cable plugged into your Mac can actually do — speed, power rating, e-marker data, PDO profiles, and connected device identity — in plain English.
Project Structure
Sources/WhatCable/
├── WhatCableApp.swift # App entry point, menu bar setup
├── ContentView.swift # Main popover UI
├── PortSummary.swift # Plain-English logic per port
├── PDVDO.swift # PD VDO bit-twiddling / spec decoding
├── IOKitReader.swift # IOKit service queries
└── ...
scripts/
└── build-app.sh # Universal binary + notarisation
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