I use Kiwoom Hero3 Home Trading System client to do stock trading, but if I load this app inside the VM while in Coherence mode, the window simply does not appear at all. If I switch in and out of windowed mode, it shows the window, but the visibility is misaligned. This happens to both the login screen and the main window. Anyone wanting to see what happens can download the client here: http://kiwoom.co.kr/html/download/KiwoomHero3Setup.exe You need security certificates, so at most you can do is just see the login screen, but that should be enough to give you an idea of what's going on. The problem is observed in ALL Parallels builds that have Coherence feature, including the most recent Release Candidate. I think the issue is related to how the client renders the windows in a non-traditional way, and thus Coherence not being able to 'pick out' the shape of the window.