USB 3.0 FAQ

Can I use a USB cable to connect 2 USB 3 device to my computer?

Yes, if the cable end may be connected to the connector on the device. However, since the USB cable 2 has fewer internal cables, you will not get the speeds offered by USB 3 ports, and power may be limited to 500 mA.

Solving problems with USB devices 3 on your Mac

See the information below to resolve problems you may encounter when using USB 3 devices with your Mac.

How do I know if my device is connected as a USB 3 device?

Use the System Profiler:

  1. From the Apple menu, choose About This Mac.
  2. Click System Report.
  3. Under the header equipment on the left side of the window System Profiler, click USB.

USB devices are listed under Bus 3 USB 3.0 and 2 USB devices are listed under USB 2.0 Bus. Click the name of a 7-port USB hub for details.

Why my USB 3 devices they seem to work only to the USB 2 speed when using virtualization software on my Mac?

Some virtualization software does not yet support USB 3. Contact the manufacturer of your virtualization software for more.

Why some USB devices 3 do they not activate or do they not appear on the USB bus 3?

Follow the tips below if a USB device 3 is not activated or not displayed on the USB bus 3:

  • Make sure you have installed the latest software updates available for your computer.To find out, choose Apple App Store in the menu and see if updates are available.
  • Sometimes unplugging and then reconnecting the device solves the problem.
  • Try plugging the device into another USB port on the computer.
  • Check with the manufacturer if an update of the firmware is available for your device.
  • If the device was supplied with an AC adapter, use it.
  • Restart the computer.
  • Try using a different USB cable 3.
  • Try using another USB hub 3.

Why do I sometimes difficulties with Wi-Fi or Bluetooth devices when USB 3 devices are connected to my computer?

Some USB 3 devices, including hard drives, can cause radio frequency interference, which may themselves prevent Wi-Fi devices using Bluetooth and a 2.4 GHz band to communicate properly with your computer.

Do not place hard drives or other USB devices behind your Mac or near the hinge of the screen. Wi-Fi and Bluetooth antennas are located at these locations. Therefore, it is possible that the USB devices 3 in the same position interfere with your wireless connections.

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