i have a strange problem. I formated an usb-Stick (64GB) on my iMac (Mac Journaled Filesystem). Not encrypted, no password. It works fine on several devices (e.g. Popcorn Multimediabox), Windows-Computer (uuugh) and even on the iMac. But if i plugges it to my Macbook Pro, the USB-Stick is not recognized there. Other Sticks works fine but this stupid single stick not.

This is the last chance for this stick. I'll give it to a poor life by a windows guy if there is no chance to fix it :-(.

  • are there any entries in the console when you plug the USB-Stick into the MacPro? If there are, please post them. – J.C. Mar 9 '16 at 9:28
  • Does it show up in the device tree? – JMY1000 Mar 9 '16 at 9:59
  • The usb stick isn't shown in the device tree. Neither in the finder sidebar nor in the system information device tree. – MacKay Mar 10 '16 at 11:07
  • I'll check the console later this day, when i'm back at home... – MacKay Mar 10 '16 at 11:08
  • So, the console tells: 10.03.16- KW 10 18:46:02,000 kernel[0]: 000109.320828 PRT6@14400000: AppleUSB30XHCIPort::resetAndCreateDevice: failed to create device after (1) tries, disabling port – MacKay Mar 10 '16 at 17:48

I know the reason ! It works with an USB-Hub with additional power. Plugged into the Macs directly, no stick is working. On Windows-based machines (even in the Bootcamp on my iMac) the stick is working. It seems, that windows usb-drivers gives more power to usb devices (?)...

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