This morning, my Mac Pro (Mid 2010, Mavericks 10.9.5) suddenly began producing choppy streaming audio and Safari became pretty sluggish. I figured it was a problem with the ISP until I tried using iTunes - and my local music library suffered the same audio playback problems. I narrowed the problem down to Safari - the choppiness only happens when Safari is running. No problems when running Chrome. The Activity Monitor showed hundreds of idle wakeups on the coreaudio process, not sure if that is related to the problem. I know Mavericks has had some audio issues, but this is the first time I've experienced it. Also, the option to stop plugins to save power in Safari is not checked, so that can't be the cause of the problem. Has anyone else experienced this? I'm probably going to uprgade the OS, but if I can fix this issue without doing so I will.