... Has repeatedly quirks with the Bluetooth transmitter! Granted, I still hang a Magic Trackpad and Bluetooth keyboard, but that should not be an issue. There are little things like processor usage, program changes, etc., suddenly trigger a half sec. Delay in the audio transmission. Very annoying. I have unfortunately read too late that the Bluetooth standard is 3.0. Maybe it is connected with? Or simply Apple, which anyway always have problems with wireless transmissions (all my Apple devices have been around for years repeatedly wifi problems).