8 Replies Latest reply: May 17, 2012 8:00 AM by danielfromascot vale
danielfromascot vale Level 1 Level 1

Hi guys,


I have an 8-core mid 2010 MP

Clean install of lion 10.7.3


Copying over MOV files from USB card reader plugged into the front USB Port of my machine. I get great transfers, then every 2-3 times I get a dropout, which cause me to loose and corrupt my Files.. A real scary thing when its wedding footage!!!


I also noticed my keyboard has issues every few hours of use with the front usb ports. Whilst typing this, my keyboard died twice!


Its random.. Any suggestions??? This is driving me crazy!


Also notice its both USB front ports, and the FIrewire is fine.. Sometimes it seems like the USB 2.0 ports after a fail, transfer files at USB 1.0 speeds..

Reply by Grant Bennet-Alder on May 6, 2012 7:44 PM Helpful

The keyboard represents a unique problem for USB.


It uses almost all of the allotted power for a USB port all by itself. It only has enough power left for ONE low power mouse such as the Apple mouse. The second USB on the keyboard is ONLY for convenience of plugging in either left or right handed mouse. Any other device plugged into the keyboard can cause both the keyboard and the other device to malfunction.

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