Coherence (Parallels Build 9.0.24172)was working on my MacBook Pro under Mavericks, suddenly its not. Have 2 external monitors - one using DisplayLink (was using 2 DisplayLink, but that currently doesn't work under Mavericks) and one using mini display port to DVI. Could the 2 different video outputs be causing the problems? Other thoughts?
When using 10.9 for both guest and host on a retina Macbook Pro, I am seeing problems with coherence as well with my Thunderbolt display connected. When I try to invoke coherence mode, I see a screen of graphics distortion on the external (primary). If I turn off 3D acceleration, it *sometimes* works, but is so painfully slow that it is unusable for normal work.