Finder is too slow on El Capitan and constantly freezes
Hi
Since I upgraded my Macbook Air mid-2012, every single action on the Finder lasts about 5 minutes.
If I open a folder, delete a file or anything else, it simply freezes.
The phenomenon occurs just on one session, the others don't have any problem.
I stopped all the extensions interacting with the Finder but there was no improvement.
There is something else I noticed ; in the sidebar list there are hundreds of blank favorites :
I thought that could linked to my problem, then I tried to delete them one by one but it takes 5 minutes for each one.
I tried to edit the file com.apple.sidebarlists.plist in my Library to erase all those blank favorites but there was no result.
I finally found out that the sidebar favorites where stored in the com.apple.LSSharedFileList.FavoriteItems.sfl (in this folder : /Libray/Application Support/com.apple.sharedfilelist/ ). I tried to edit this file, or even to simply erase it, but every time the Finder reloads this file is restored and the blank favorites come back.
I forgot to mention that I also reinstalled El Capitan but the problem still remains.
Do you have any suggestion to solve this problem ?
MacBook Air, OS X El Capitan (10.11)