My Macbook pro is running OSX Mavericks, this OSX and this Hardware work fine together all day. But when I start Parallels 9 Windows 7 VM, less than a minute after the Win7 desktop appears the OSX video scrambles then turns black, keyboard and track-pad becomes unresponsive and the whole Mac OS freezes, requiring power down to force reboot. I tried setting Parallels video memory to 128M but that made no difference. This same Win7 VM image ran fine for more than a year on Parallels 8 and OSX Lion.
Thanks for your help.
Thanks for your help.