Finder freezes - needs 20 seconds to react
Hi I encountered a strange behaviour on my late 2013 iMac that appeared out of nowhere. I did not update or install a new version of something. From one day to the other my finder is slow and does not react for seconds. Whenever I open a finder window the mouse cursor turns into the rainbow-color spinning wheel and I can do nothing. Approx. after 20 seconds the mouse cursor is back again and everything works fine. I can browse through folders etc. But when I click outside the finder window or switch to another application and come back to the same - or a new finder window - the mouse again turns into the spinning wheel. The same happens when I press the space bar to preview a picture or word doc or pdf. The documents opens in the preview window, but I can not browse through the other docs in the folder with the arrow keys for again 20 seconds.
What I did to solve the problem is to delete the com.apple.finder.plist in the library/preferences folder. But it did not help.
I have a network connection via a Thunderbolt to ethernet adapter to a macpro. But this is my standard configuration and worked quite well for month.
The only thing that came to my mind is, that the finder is first trying to verify the network connection every time it is opened and after verification is OK, you can use it. But the problem remains whether the macpro or the network connection is on or off.
OSX version is 10.8.5
Any ideas???
Mac Pro, OS X Mountain Lion (10.8.5)
