Got a weird problem. I have a Canon N1220U scanner which works fine on my PC but doesn't do anything on my intel iMac. When I connect the usb cable to the keyboard port it says there isn't enough power available for the device so move it to another socket. When I move it to a port on the imac itself nothing happens and OSX cannot find it when I search for twain devices. There is only one connection on the scanner, no power as it comes through usb. I can find some osx plugins on the canon website so it looks like it should work and the apple site says it is supported natively so what is going on? Has anyone else had trouble with canon scanners?