As far as we’re aware, there shouldn’t be any memory leaks with X2.0.1 on the Mac. There were a few instances in X2.0.0 where there’s a potential for a memory leak on some CWYW dialog boxes, but this cleans up instantly when the dialog is closed, and these were fixed in X2.0.1. Do you have the same sort of problem using the sample Paleo library on a new document (in other words, are you able to isolate the problem to a specific Word document or library that you’re using)?