Hello everyone, When loading an existing Logic X project / session, either none of the windows are visible or (after multiple restarts and re-opens) the “outlines / shapes” of windows are visible but the windows are all either completely black or completely white. Sometimes the playhead position line is visible. I can hit the space bar and playback is working perfectly fine. Can not quit logic or load a different project, only force quit. Can access older versions of the project (saved under a different project version number), when opening these directly from the project folder. Opening one of the latest versions through the project folder leads to the same bug. I am hoping that the collective knowledge of this forum is able to help… Many thanks! ________________ High Sierra (10.13.6), Logic X 10.4.6.