I'm running Parallels 10.4.0. Since upgrading to Sierra, it eventually freezes up. I get the constant spinning icon. Worse, it starts creating these logs that grow until I kill Parallels. These things grow by GBs per minute. A couple of times it went to 200GB and locked up my computer because all free disk space was taken. There isn't anything on the website that says 10.4 won't run with Sierra. I've tried to find the tech support phone number but can't. Does anyone have any idea how I can fix this? Anyone know have the tech support phone number?