The Thunderbolt chip switches between the two protocols to support varying devices. In this case an adapter may be needed to convert from.Based on copper, the Thunderbolt specification contains two protocols: PCI Express (PCIe) and DisplayPort. In many cases the newer MacBook Pro do not feature a USB 3 Type A Port. You may be using the wrong cable.

Among PC and peripheral device manufacturers, USB adoption is virtually 100%. PCIe is a computer expansion bus standard, the main advantage being that users who've already invested in PCIe-enabled devices can continue to use them.USB is among the most successful interfaces in the history of personal computers. It uses only 1.5 amps of power for charging devices, or about one-third of the power of its predecessor Hi-Speed USB (2.0).Thunderbolt has the ability to serve as a transport for PCI Express (PCIe), something USB is incapable of. SuperSpeed USB is optimized for power efficiency. A Thunderbolt connector has two full-duplex channels each are bi-directional and capable of 10Gbps of throughput.Thunderbolt also offers up to 10 watts of power to a device.

Usb 3 Max Adapter For Mac