Since upgrading to El Capitan, I started having problems with my USB Bose speakers, disconnecting randomly. Hoping the issue would be dealt with I continued upgrading to the current version 10.11.3, and now I have a malfunctioning USB monitoring Video Camera. When Are these USB problems going to get handled appropriately? Now i cannot listen to music and also have video problems, cannot monitor through a video camera conected via usb to my iMac. I have read of sound problems, printer problems, music decoding, video, all tied to the usb bus. So what's next?