About a week ago, iTunes on my iMac began launching on its own and playing random tracks. Sometimes the music stops itself after 15-20 seconds. Other times, it just keeps playing. This often happens when no one is even in the same room as the computer (so it's not errant keystrokes). Details: My iMac is a mid-2011 model running OS 10.11.5 and iTunes 184.108.40.206 (although the issue began while running OS 10.11.4 and iTunes 220.127.116.11). The remote control infrared receiver is disabled under System Preferences > Security & Privacy > Privacy > Advanced. No devices (like an iPad or iPhone) are attached. Open at startup is not set for iTunes. The only Bluetooth devices paired with the iMac are the stock Apple mouse and Time Capsule. (Keyboard is Apple USB. There are no Bluetooth speakers.) Wifi is off on the iMac. (Internet connection is via ethernet cable.) I do not have an iTunes dashboard widget. What could be causing this? The commands to start playing iTunes must be coming from somewhere. If I can't find what's generating the commands, can I stop the service that's "listening" for these commands (assuming that doesn't break something else)? This is insanely annoying.