Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. 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 just re-installed Firefox, but the thumbnail is not showing in the dock applications folder. The icon DOES show both in dock and in finder.

I have tried to re-install Firefox again but without success.

Any advice?

share|improve this question
up vote 3 down vote accepted

This is a result of one of OS X's security features.

This icon is shown to tell you that the program is potentially unsafe because you haven't opened it yet and it was downloaded from the Internet.

The first time you open the app, you'll see a security dialog that says, "App Name" is an application which was downloaded from the Internet. Are you sure you want to open it?"

Once you click Open on that dialog, the app will open and the icon will change to the app's normal icon.
Usually, you shouldn't need to restart or anything like that.

Since it's appearing on the Finder but not in the Dock, you can force the Dock to refresh its icons by relaunching it: open Activity Monitor, find the Dock process, and click Quit Process.

Mostly copied from my answer on Ask Different

share|improve this answer
Oh wow! Even though it "fixed" itself more or less, great information! – Tim S. Feb 9 '12 at 9:11

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.