Hello, I am new to the forums, but an experienced Mac user. I recently got a Canon Eos50D DSLR and wanted to import images onto my mid 2012 macbook pro running the latest version (10.9.5) When i plug in the camera using 4 different usb cables, non of them work, not even in the slightest, camera doesn't show up in finder, desktop, iPhoto doesn't launch, doesn't show up in disk utility. Its like there's nothing in the USB Port. The USB Port works fine, works with any USB I tried. I then tried to connect a video camcorder, using once again, 4 different cables, and still 0 response. I have tried on another very similar macbook pro and a iMac 27 Inch; Same thing. I have come to the conclusion that either all 4 USB cables are broken (Highly, Highly unlikely) or the usb ports on the camcorder, the Canon and i also tried a external hardrive which also would not show up, do not work (Also, highly unlikely) If anyone can help me, please, this is killing me, i have tried restarting and everything, i have not been able to try on a windows computer, but will as soon as i can. What could be wrong?