Slow Finder on iMac running OS 10.8.5
Hey Apple gurus!
I have a problem with my iMac running OS 10.8.5. It started from nowhere. All the software is running absolutely fine but as soon as I get to a finder and trying to open a folder and/or move between files in a folder within the finder or click a preview, a movie or a photo, it takes 10-15 seconds for a computer to "wake up". It just spinning until it finally catches is up and eventually it does what I want. Than I can browse in the finder between files with no problem until I pause for few minutes and when I am trying to navigate through folders again the same "wake up" problem. Its very annoying and really slows me down. I went through Apple utilities few times, I thought maybe its going to fix the problem, but it made no difference. I thought maybe its my USB devices and disconnected them all but still the same problem. Any suggestions how to fix it.
Thanks.
iMac, iOS 8