OK, I think I may have inadvertently let you astray... I shut down my MPB last night after copying all those music files (during which piggy was running 5x). I just rebooted my MBP and ran 5 instances again. This time there were notable differences: 1. The cpu bar graph did not pass about 1/4 their height. Last night they were pegged at the top. 2. I saw the "waiting for enter" prompt on the first 4 instances after about 30 seconds, and the 5th one showed up after about 2 min from start. Last night I never saw this "waiting for enter" prompt. 3. The fans on my MBP did not come on, as they did last night almost as soon as I started piggy. I have attached a revised screen shot of the results from now (the cpu bar heights in the graph occurred when I pressed the cmd-shift-3 for the screen shot and was apparently captured by it). If appropriate, I will edit my previous post with the screen shot to send future viewers to this post. Sorry if I caused you trouble on your evaluation.