12 Replies Latest reply: Jul 29, 2014 4:44 PM by Motion Flares
Motion Flares Level 1 Level 1



I just learned I might have to purchase a new Macbook because my USB ports are fried and I was looking at purchasing a refurbished Macbook pro from 2012:


http://store.apple.com/ca/product/FD101LL/A/refurbished-133-inch-macBook-pro-25g hz-dual-core-intel-i5


the only trouble is I make music with a MOTU Audio Express sound card, and it only has a USB 2 port and a bus-powered Firewire (which I don't like using since it hasn't been too reliable in the past).


Unfortunately, it seems that the Macbook I'm looking into purchasing only has USB 3 ports, and I looked for info on USB 3->USB 2 adapters online and this simply doesn't seem to exist. The only info I managed to find on this subject was this little bit on the Apple website:

Can a USB 2 cable be used 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, because it has fewer wires, you won't get USB 3 speed and power may be limited to 500 mA.

does this mean that I can connect a USB 2 cable from the USB 2 port of the MOTU sound card to the USB 3 port on the Macbook? I'm OK with the power and the speed being limited to USB 2 power, I just want to make sure I can actually use my sound card with this new Macbook.


MacBook Pro, Mac OS X (10.6.8)
Solved by Niel on Jul 29, 2014 4:14 PM Solved

If you’re using a standard USB 2.0 cable, it’ll work. Click here for more information.



Reply by Niel on Jul 29, 2014 3:57 PM Helpful

Yes, it does.



Reply by Kappy on Jul 29, 2014 4:00 PM Helpful

It's my understanding that all the USB ports are both usable on 2.0 or 3.0 devices. However, I have read somewhere that if you use a 2.0 device in the port before it has ever been used, then that port cannot be used with 3.0 devices (or it may have been the other way around. I'm not sure nor do I even know if it's true.) This is sort of contrary to what I have seen on other computers with USB 3.0 ports that work interchangeably with USB 2.0 devices regardless of the cable. Note that most USB 2.0 devices cannot accept the device end of a USB 3.0 cable. It is not the same as for USB 2.0 devices.

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