mac pro (2013) fails to see usb 3.0 connected drives in boot selection screen

Hi,

I am using the late MacPro and have three drives attached via an USB 3.0 hub (Anker Uspeed USB 3.0 7 Port Hub).

The hub has a VIA VL812 chipset with the latest firmware update (9081) - I have verified this.

My problem is, when I enter the boot device selection screen (by pressing the alt-key during startup) none of the drives is recognized.

When I plug any drive directly into one of the four USB 3.0 ports of the MacPro, thereby bypassing the hub, it becomes visible and I can use it to boot.

AFTER the boot process, when OS X has finished loading, everything works fine. I have used two of the drives to backup several GBs of data from my main drives (connected via Thunderbolt) with no issues.

Is anybody able to connect drives through a USB 3.0 hub and use them in the boot selection screen? Which USB hub do you have?

Thanks

Martin

Posted on Jan 30, 2014 12:03 AM

17 replies

Mar 24, 2014 5:16 AM in response to mdopp

I have the similar problem! Can't connect any USB 3.0 device directly to may mac pro. After connect, it will be take 30 secs to occur any errors......

So when I plugged in my USB 3.0 hard drive, to my USB 2.0 Apple Keyboard it will work

Mar 24, 2014 7:41 AM in response to HennesyNet

It is a mistake to plug anything except a mouse into your keyboard.

1) in some cases, there may not be enough USB power to run even the keyboard after you do.

2) you paid for USB-3, but when hooked to the keyboard, any device downstream gets only USB-2 speeds.

3) this puts the USB drive behind a Hub, which in general makes it more difficult for your Mac to find it for booting.

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mac pro (2013) fails to see usb 3.0 connected drives in boot selection screen