My setting MacBook Air 11", 2013 8 GB ram Parallels Desktop 9 Update to last version Client Mac OS 10.8.5 (1 CPU dedicated, 2048 MB reserve for it and 128 MB for the video card) I use it to install Java virtual machine (which I do not want to install in directly in my machine) and use Eclipse to do some Java programming. This happen to me a few times so far. When I am finish working in parallels, I do not close the windows to Suspend the virtual Mac, and I return to my Real mac. After a while a hear the fan going crazy. I look into Activity monitor and i see both CPU at 100% on this prl_vm_app parallels task. Switching to Parallels I see that my 10.8.5 is suspended (as expected after a long time of inactivity). Trying to Resume my virtual Mac bring my a Frozen OS and I have to Shut down and quit parallels. Then CPU usage is back to normal. I must Add that the frozen OS also happen when I work but I could not find a sequence of things to, do to reproduce the problem. Parallels is a nice and certainly a complex product, and i understand there could be bugs sometime. I hope the programmer will find the problem rapidly. I will give them time, but we have to remember that Parallels kind of Rent this software for 50$ a year. I have many others programs on my mac and none of them take both core a 100% when they are not in used. Not a small problem in my eyes.(others could think Differently, but that's my view
