Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm on Lion 10.7.3 and every now and then, hogs my CPU @ 100% for a little less than a minute, especially when there's something happening on Finder. I know that QTKitServer is the Quick Look server, but it seems its generating files unexpectedly or something of the sort.

Does anyone have a fix?

Note: This started happening when I upgraded from Snow Leopard to Lion.

share|improve this question
QTKitServer is actually a QuickTime component, it may be used by QuickLook to show previews. – Stu Wilson Oct 11 '12 at 12:44

Normally this is due to unfinished/corrupted video files in your downloads folder. I am assuming this is the case for you.

This should solve the problem:

  1. Open Finder an navigate to your downloads folder.

  2. Right-click and select Show View Options.

  3. Untick Show Icon Preview.

share|improve this answer

I was informed that download apptamer would solve the problem. The activity was reduced significantly. Right now I'm on a 15 day trial. It appears from what I found here:, that others have found it useful too

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.