As stated in an earlier post EN X5, but not X6, works flawlessly without the common performance issue on Mountain Lion 10.8.2 on the same computer. So it is seems not to be an OS problem but something must have changed from X5 to X6 to render it incompatible with ML 10.8.2. Has this been fixed in X6.0.1, or is X6 still unusable? I do not dare to upgrade (again) from X5 until I get this information. The Readme file for the updater tells:
Improvements in X6.0.1
* Improved syncing with EndNote Web
So has the (in my mind more urgent) performance problem been solved too?