I have disabled sleep on all the systems. I even disabled the screen saver. They would still randomly disconnect and stop printing. None of the prints would have been more than an hour. I have a Mac Pro running Yosemite, a Mac Pro running Mavericks, and 2 MacBook Pros running Sierra. I was thinking it was caused by the printers, but I went back to .56 and I have had no issues. I like the look of 1.0.2, but can't use it yet. Maybe 1.0.3?