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10.5: Change the 'active app' dock indicators System 10.5
If you don't like the new golwing blobs under a running application's icon you might want to change this sooner or later. Choose Finder » Go » Go to Folder, type the following, and click Go or press Return:
This will navigate you right into the resources of the Dock. We are interested in these files:
  • indicator_large.png
  • indicator_medium_simple.png
  • indicator_medium.png
  • indicator_small_simple.png
  • indicator_small.png
Here's what to do:
  • Copy these files to your Desktop or any folder you have access to.
  • Make an backup of the original files by compressing all five of them.
  • Open these PNG graphics in Photoshop or any other graphics editor capable of handling transparency.
  • Change the color as you like it, or change both the form and color. You should not change the pixel size of the images. How about yellow arrows or red squares?
  • Save the changes back as PNG with transparency on.
  • Copy all the edited graphics back into the Resources folder you opened earlier. You will be asked to enter the administrator's password before you are allowed replace the originals with your versions.
  • In the Terminal application, enter the command killall Dock to restart the Dock in order to make your changes visible.
[robg adds: If you're using the 2D dock everywhere, you only need to change the "_simple" indicators. I would also suggest running Disk Utility's Repair Permissions when you're done, as your modified files will have different settings than the defaults. It's not necessary, though, as the Dock will work just fine without doing so.]
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10.5: Change the 'active app' dock indicators | 3 comments | Create New Account
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10.5: Change the 'active app' dock indicators
Authored by: tc60045 on Nov 06, '07 02:02:54PM

I would love to pilfer someone's good looking, "brighter" replacements -- having zero $ for photoshop and zero photoshop "skillz"....

Show off your handiwork, hintsters!!

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10.5: Change the 'active app' dock indicators
Authored by: errorik on Nov 07, '07 12:45:08AM
People are sharing their modified dock resources here:

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10.5: Change the 'active app' dock indicators
Authored by: errorik on Nov 07, '07 12:59:40AM
As indicated, if you are using the 2D Dock you only need to modify the _simple images.

But it's not noted that if your dock is on the Left or Right (2D dock) the images are actually rotated.

This may or may not screw up the custom look you are aiming for, so make sure you rotate your new graphics if needed.

I used the Super Mario mushrooms found on ( and it was really apparent my shrooms were sideways.

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