USB Mechanical Keyboard and Mavericks

Discussion in 'OS X Mavericks (10.9)' started by Onmybikedrunk, Jun 16, 2014.

  1. Onmybikedrunk macrumors member

    Jun 24, 2010
    Hey folks, I have a 6,1 Mac Pro and I just bought a Vortex Race II Mechanical Keyboard. It's pretty amazing and works fantastic in Windows, but on the OS X side it's very frustrating.

    They Keyboard is recognized and works with a U.S. standard keyboard profile and shows up in the system profiler under the USB tree. HOWEVER, after about 10 minutes (even if I'm in the middle of typing) it just stops working! The LED's stay lit, and it still appears in the system profiler, but you press a key and nothing!

    I know the original Apple USB keyboard has always had power issues, but after searching the web for quite some time I can't seem to find a fix. Just curious if anyone else out there using a USB keyboard has had similar issues.
  2. Partron22 macrumors 68020


    Apr 13, 2011
    Plugged straight into Mac, or through a hub? Powered, or not?
    What other USB devices are you running?
    Sometimes one misbehaving device will bring down others, so try minimizing what you have connected to see if that helps.
    I've had USB mice go off like that, but my lighted Saitek Eclipse II USB keyboard has never been a problem.
  3. Onmybikedrunk thread starter macrumors member

    Jun 24, 2010
    Plugged straight into the Mac. No powered hubs (yet... although I've heard of this being a solution for similar problems), although I did try the USB3 hub through my Dell monitor, and that didn't make a difference. I took it down to the only devices (outside of my monitor tho I unplugged the USB bus) being plugged in to just the keyboard and mouse, reset PRAM, SMC, repaired permissions, flushed kext cache all that and STILL, the same problem. Another suggestion I came across is to use a USB extension. A lot of people using the Apple branded USB keyboard are having the same problem, and with the addition of a the usb extension cable that comes with the Apple USB keyboard, the issue goes away. I just happened to have one laying around from an old Mac Pro, and doesn't do a darn thing for my issue.

    Console isn't reporting any problems unless it just stops working while I'm typing, then it's an IOUSBFamily kext error... You know, the ol' "IOUSBFamily is having trouble enumerating a device". I'm at a loss. This keyboard rules, and functions perfectly well in Windows (on the same machine via Bootcamp!). It's clearly a driver issue having something to do with power to the USB ports. The USB Device Tree is saying that it requires 500mA of power, while the manufacturer says only 100mA. That's my only clue as of yet. I'm OK with figuring out problems like this usually, but this is above my knowledge level. HELP!

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