USB Stick works on iMac, but on MacBook Pro not 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 :-(.
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 (?)...