Mountain Lion 10.8.4 iMac mid 2011. Since this morning, this weird thing happened, Activity Monitor shows Finder CPU usage above 50% and memory above 11GB (on a 12GB system) which leaves me with 10-100MB free memory. Last thing I did last night was to download DeCloner to remove my duplicated files, the search took a few hours so I went to sleep, this morning everything was fine, until about 1 hour after working on my mac this happened. I've tried uninstalling DeCloner, VisualBox which I installed recently. I also tried restarting Finder, restarting the system, disabling Spotlight and its indexing, no luck.