I have a mac osx operating system. When I plug in my Canon MG 3520, the only light that comes on is the 4x6 photo paper. When I press the power button, it'll turn on, but when I hold it down to turn off it won't turn off. So pretty much my printer freezes and doesnt respond to me even resetting it...if I hold down the stop button nothing flashes or anything. The printer was working fine last use.