After many weeks of excellent playback, JRiver MediaCenter 27 for Mac now stops feeding sound to output after exactly 2 min of play. I tried updating to the latest version (27.0.66) but no joy. I am using Mac OS 10.13.6, High Sierra. Nothing unusual seems to be happening when running Activity Monitor - Media Center is the top activity and usually Windowserve after that. It does not matter which media file I am playing. Most unusual, and annoying. I have to double click to stop and then it plays back OK from the beginning until 2 min - no sound, but MC is still active and the spectrum display bouncing and the progress bar progressing. I was feeding audio output to core audio under tools options and tried feeding it directly to my USB Dragonfly DAC that drives my Hi Fi, but same problem. I searched around on the forum, and saw one other 2 min stop under different conditions and setup, but no resolution. Any ideas?