Not enough juice. First, you’re going to want to look for the Thunderbolt symbol. Its a little lightning bolt that is—sometimes—used to mark a Thunderbolt cable or port. Often, though ...

USB has an array of symbols that alert you to a cable’s speed and power rating (top left), but only some manufacturers display an appropriate symbol (top right). Thunderbolt 3 cables are more ...

Not enough juice. First, you’re going to want to look for the Thunderbolt symbol. Its a little lightning bolt that is—sometimes—used to mark a Thunderbolt cable or port. Often, though, it won’t be ...