I have Parallels Desktop for Mac v.9. Installed Windows 7 and have OS X Mavericks. Some games turn to black screen when starting. Rebound Infinity and Rebound Lost Worlds are examples. When I used Windows XP with Parallels, I did not have this problem. No problem on PC with Windows 7. Updates are current, Parallel Tools are current and tried changing resolution. Did not find any fixes in documentation or Forum. Help appreciated.