Using USB 3 devices on Mac computers FAQs

What is USB 3 ( “SuperSpeed ​​USB”)?

USB 3 (also called “SuperSpeed ​​USB”) is the latest USB standard which offers significant improvements in performance over USB 2 ( “Hi-Speed ​​USB”).

Does the Mac supports USB 3?

System Information System Profiler or the type of USB Hubs you have the Mac, the speed at which they work and what are connected at that time indicated. More information on  how to identify the USB ports on the Mac.

What transfer rates offers USB 3?

  • USB 3 can transfer data at a maximum speed of 5 Gbps.
  • USB 2 can transfer data at a maximum speed of 480 Mb / s.
  • USB 1.1 can transfer data at a maximum speed of 12 Mb / s.

Using USB 3 devices on Mac computers FAQs 1

Do you provide more current USB 3 USB 2 ( “Hi-Speed ​​USB”)?

Yes. 3 USB devices can use up to 900 mA of current (compared to 500 mA using the two USB devices). You’ll have to use a USB 3 cable to take advantage of current available 900 mA. The USB 2 cables do not support 900mA.

Why do I not see any blue tab on the USB ports on my Mac?

Some manufacturers use a blue tab to indicate that a device is USB port or 3. All USB ports compatible with USB 3 Mac can use USB 3, and have no blue tab.

What USB 3 devices are supported?

All compliant devices called “USB Specification 3.0 version 1 of 2008” are supported.

Are USB 3 hubs compatible?

Concentrators that meet the so-called “USB Specification 3.0 version 1 of 2008” are supported.

How I can get the most out of the USB 3 ports?

The first device to connect configure the port, so always connect in the first place hubs or USB 3 devices.

What happens if I connect a USB 2 device first to a USB 3 port?

If you connect a USB 2 hub first, all devices connected or “chained” to that hub will operate with maximum transfer rate of USB 2 speed (480 Mb / s).

What if I connect a USB 3 device to a USB 2 port?

Your device should be backwards compatible with USB 2. ports However, you will not enjoy the speed of USB 3 and the current could be limited to 500 mA.

You can use USB 3 in Windows 7 and 8 using Boot Camp?

Yes . USB 3 is natively supported in Windows 8. See Boot Camp: Frequently asked questions about installing Windows 8 . For more information To implement support USB 3 in Windows 7 with Boot Camp, download and install the software compatibility with Windows (drivers). Consultation Boot Camp: Frequently asked questions about installing Windows 7 for more information.

Using USB 3 devices on Mac computers FAQs 2

Is there a difference between USB 3 cables and other USB cables?

Yes. USB 3 cable:

  • Use more filaments than other USB cables and so are a bit thicker than other USB cables.
  • They usually have a blue tab.
  • Show the “SS” symbol on the computer connector.
  • They lead at the end of the device different from the USB 2 cable connector.
  • They can provide more power to the connected device (900 mA).

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

If the device end of the cable fits into the connector on the device, yes. However, since the cable has less filaments, thou shalt not number with the speed of USB 3, and power may be limited to 500 mA.

Solve problems with USB 3 devices on Mac

With this information you can solve any problem you have with the USB 3 devices on the Mac.

How I can check my device is connected as a USB 3 device?

Use the System Information utility:

  1. From the Apple menu, choose About this Mac.
  2. Click System Report.
  3. In the Hardware header that appears to the left of the System Information window, click USB.

Using USB 3 devices on Mac computers FAQs 3

USB 3 devices appear on USB 3.0 Bus and USB 2, USB 2.0 Bus. Click on the names of the devices for more information.

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

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

Why Some USB 3 devices are not activated or not appear in the USB 3 bus?

If a USB 3 device is not active or not displayed on the USB 3 bus, try this:

  • Make sure you have installed the latest software updates available for your computer.Select App Store on the Apple menu to see if an update is available.
  • Sometimes just unplugging and replugging the device to solve this problem.
  • Try connecting the device to another USB port.
  • Check if the device manufacturer provides a firmware update.
  • If the device came with an AC adapter, use it.
  • Restart the computer.
  • Try a different USB 3 cable.
  • Try a different USB 3 hub.

Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices connected to the computer?

Some USB 3 devices, especially hard drives, generate radio frequency interference. These can make Wi-Fi and Bluetooth devices operating in the 2.4 GHz band have trouble communicating with your computer.

 

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