I'm using a mac book pro with retina display running under Yosemite. Crash happened after I connected the laptop to a projector with HDMI cable. Mac 'side' worked perfectly but 'Parallel/Windows 7 side' turned black with stripes. I have rebooted, both parallel and entire system, repaired permissions and disk, uninstalled and re-installed parallels. Nothing worked, same screen. Mac still working fine but I need to use ArcGIS that can only run on Windows.... Anyone can help?