A small macOS menu bar app that tells you, in plain English, what each USB-C cable plugged into your Mac can actually do, and why your Mac might be charging slowly.

USB-C hides a lot under one connector. Anything from a USB 2.0 charge-only cable to a 240W / 40 Gbps Thunderbolt 4 cable, all looking identical in your drawer. macOS already exposes the relevant info via IOKit; WhatCable surfaces it as a friendly menu bar popover.

一款小巧的 #macOS 菜单栏应用程序，它以通俗易懂的英语告诉你，插入 Mac 的每根 USB-C 线缆的实际功能，以及 Mac 充电速度慢的原因 。

USB-C 接口下隐藏着许多功能。从仅支持充电的 USB 2.0 线缆到 240W/40Gbps 的 Thunderbolt 4 线缆，它们在你的抽屉里看起来都一模一样。macOS 已经通过 IOKit 公开了相关信息；WhatCable 则以友好的菜单栏弹出窗口的形式呈现这些信息。