May 1, 2026
Cable chaos, comment carnage
Show HN: WhatCable, a tiny menu bar app for inspecting USB-C cables
This tiny Mac app exposed the great cable drawer scam — and the comments went wild
TLDR: WhatCable is a small Mac app that reveals what your USB-C cables can really do and why charging may be slow. The community loved the rapid-fire updates and accessibility angle, but also turned it into a lively debate about menu bar apps, Linux envy, and AI rebuilding software at absurd speed.
A tiny Mac app called WhatCable just did something weirdly thrilling: it tells you, in plain English, what that mystery USB-C cable in your drawer can actually do. Is it fast? Is it only good for charging? Is your laptop charging slowly because the cable is secretly terrible? The app turns all that hidden info into a simple little window, and Hacker News immediately treated it like a mix of public service, accessibility win, and full-on geek soap opera.
The biggest applause was for the creator’s chaotic speedrun of shipping updates. One commenter cheered that the developer pushed 16 releases in 7 hours, basically live-editing the app based on community demands. Don’t like menu bar apps? Fine, now it runs like a normal app. Hate graphical apps? Boom, there’s a command line version too. That led to the classic comment-section mini-drama: one camp was delighted, while another immediately asked the eternal Mac question, “why do so many apps insist on living in the menu bar?”
Then came the plot twist: accessibility. One blind commenter said this solves a real problem because cheap hardware cable testers aren’t usable for them, making the app more than just a toy. Meanwhile, the peanut gallery delivered peak 2026 energy: one person casually announced they had AI turn the whole thing into a Linux desktop widget in 10 minutes for two bucks, which is either inspiring or a tiny threat, depending on how you feel about software now. And naturally, Linux users showed up asking, okay, but where’s ours?
Key Points
- •WhatCable is a macOS menu bar app and bundled CLI that explains USB-C cable, charger, and device capabilities using IOKit data.
- •The app reports per-port connection status, charging bottlenecks, cable e-marker details, charger PDO profiles, connected device identity, and active transports.
- •Users can install WhatCable as a signed and notarized universal app for Apple silicon and Intel Macs, or through Homebrew.
- •The CLI supports human-readable output, JSON output, live watch mode, raw IOKit property output, and standard help/version commands.
- •WhatCable reads multiple IOKit service families to obtain per-port state and USB Power Delivery data without private APIs, entitlements, or helper daemons.