Hey, I have an iMac 5K with 1tb SSD. I also previously had the late 2012 with 768gb SSD. SOme times, more often than not, when I move, add or delete a file it takes a couple of seconds before the icon/file appear/disappear. I hear the trashcan sound when I delete it, but the file is still there. Same also happens for renaming files. I did experience this with my previous iMac as well. I did a completely clean reinstall of my new iMac so its not linkage between the two computers, so the only thing that could cause it that could linked is if a certain program I am running causes it. Any tips or ideas ? Anyone else experienced this ?