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Some older USB devices such as flash drives or mice work on my Macbook 2007 model, but newer ones are not recognized. Any ideas about the diagnosis and the cure?

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Could you be more precise? Which newer ones are not recognized? Can you provide some example (manufacturer, model)? –  jaume Feb 13 '13 at 15:04
    
Could it be a USB 2 vs. USB 3 issue? Macs only support USB 2. –  jaume May 29 '13 at 13:19
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