Nearly three years ago, an affordable USB-C cable tester gained popularity for its ability to quickly identify the speed and power capabilities of USB-C cables. However, since its discontinuation, no similar product has emerged—until now. Mac users equipped with Apple Silicon can download a free application called WhatCable, which leverages data already gathered by macOS about connected USB devices. The app provides detailed information on every USB-C cable and device connected to the Mac, including speed ratings and power delivery capabilities. By utilizing the existing firmware’s data negotiation process, WhatCable reveals not just the advertised specs but also the actual performance metrics, helping users identify faulty cables or bottlenecks in their connections.
Why It Matters
The emergence of WhatCable highlights the growing importance of understanding USB-C technology as more devices rely on this interface for power and data transfer. USB-C supports various standards, including USB 3.2 and Thunderbolt 4, which can significantly impact transfer speeds and charging capabilities. As users increasingly depend on USB-C for high-speed data transfer and fast charging, tools like WhatCable can prevent performance issues and ensure users optimize their setups. This trend underscores the need for better transparency in data transmission technologies, allowing consumers to make informed choices about their hardware.
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