I just purchased the new 21.5" imac with the basic platform. 10.6.7. I attempted to hook up my older HP printer via usb, but it just kept saying offline. Tried calling HP reinstalling drivers over and over still nothing. Ended up getting so frustrated I went and purchased a canon MG5200. Loaded software drivers plug in the USB and nothing.... My old macbook works with the old HP and also without loading the drivers the new canon. Using the same USB cord. Also I tried to plug in the usb in every port. Even plugged in my iPhone and external hard drive to the USB ports to make sure. Does anyone have any idea what it could be?