WhatCable Pro 1.2.1 for Mac
WhatCable Pro 1.2.1 for Mac Free Download
A menu-bar utility for Apple Silicon Macs that reads USB-C e-marker data and explains in plain English what each cable can actually do and which part of the chain is limiting speed or power.
USB-C cables look identical while ratings differ wildly: 5 Gbps vs 40 Gbps, 60 W vs 240 W, passive vs active. WhatCable (Darryl Morley, MIT-licensed free app) sits in the menu bar, watches ports via IOKit, and shows cable type, vendor/product identity when available, and negotiated power or Thunderbolt link info. Plug a cable directly into a Mac port hubs and docks often hide e-markers from the host. The free tier already answers “what is this cable?”; Pro unlocks history, live metering, and negotiation breakdowns for docks, displays, and flaky SSDs.
How do I install and activate?
Launch the downloaded image and drag the application into the Applications folder shortcut.
Once the copying is complete, the application can be launched via Launchpad.
Compatibility
macOS 14 and later
