Upgrading to Yosemite has proved to be a painful exercise for my workflow. While most of Capture One 7.2.1 plays nicely there is a specific glitch with layers. Every time I want to add a new layer to an image the application locks up for about 10 seconds or more before returning to normal. I use adjustment layers on nearly everything, so a 30 minute job of pulling out the best pics from a session and tuning them up has turned into a three hour nightmare.
Is there any workaround to avoid triggering this problem under OSX 10.10? Roll back to Mavericks is not possible for this laptop. Haven't got a suitable time machine backup to do that.