Re-configure USB ports to v3.0?

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Level 1

10 points

I've read in this support article, Item #8 (Using USB 3 devices on Mac computers FAQ - Apple Support) that if a 2.0 USB device is plugged into the 3.0 ports in my iMac, they'll configure to the 2.0 speeds.

I am planning to purchase a 3.0 hub and wondered how to re-configure the ports back to their 3.0 capacity...or will the machine do this for me?

I appreciate, in advance, knowledgable inputs.

OS X Yosemite

Version 10.10.2

iMac (27-inch, Late 2012)

Processor 2.9 GHz Intel Core i5

Memory 8 GB 1600 MHz DDR3

iMac, OS X Yosemite (10.10.2)

Posted on Feb 6, 2015 8:33 PM

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Answer 1

Community+ 2026

Level 10

743,369 points

It'll happen automatically when an USB 3.0 device is plugged into them. That note refers to the first device in a mixed chain.

(121827)

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Answer 2

FWIW, I have a late 2013 27" iMac with USB3.0.

I have the following devices plugged in:

UPS monitor interface which is at USB 1.1

An external DVD/CD/Bluray reader/burner with USB 2.0

External HD enclosure with USB 3.0 interface

The external drive runs at the full USB 3.0 speed (well as fast as a

7200 RPM, 2.5" HDD drive can deliver data). This is verified by

running BlackMagic test on the external drive which delivers a read

speed of 80 megabytes per second which translates to 640 megabits

per second. Theoretical max transfer speeds of USB 2.0 is 480 megabits.

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Answer 3

Level 1

10 points

That is a relief to read. Thank you for taking time to leave a response.

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