I have an app that is very useful, but from time to time it changes its icon in the Dock, which I found disturbing for my workflow.

I would like to prevent that as I am perfectly satisfied with the standard icon.

I've tried following the instructions in the article, How to change Mac app icons but as soon as the app starts, it changes the icon back.

I've also poked around Contents/Resources directory in the app bundle, but could not find the said icon.

Does anyone have a workaround?

3 Answers 3


Here's a oneliner solution.

Open terminal and type:

perl -i -p -e 's/Pridetree/Bridetree/;' /Applications/Sourcetree.app/Contents/Resources/Assets.car

Restart Sourcetree. App icon will be restored to the default one.

  • 2
    thanks, this is the easiest way to do it.
    – r4ccoon
    Jun 21, 2019 at 23:00
  • 1
    Tnx. Easier than my solution. I'll mark this as answer
    – avidenic
    Jun 23, 2019 at 7:57

If anyone is interested, the issue was Pride icon on SourceTree app. I've found the solution here: https://community.atlassian.com/t5/Sourcetree-discussions/The-way-to-change-icon-for-Sourcetree-app/td-p/1110914

  1. Go to https://github.com/alexzielenski/ThemeEngine
  2. Switch to releases tab (I took the latest pre-release)
  3. Download .zip and extract it
  4. Open the Sourcetree.app with right click - show package contents and navigate to Contents/Resources
  5. Copy Assets.car and sourcetree.icns to any folder
  6. Run ThemeEngine from the zip in step 3
  7. In ThemeEngine click "Open Document" and open the Assets.car
  8. Find the icon named Pridetree
  9. Open sourctree.icns with your preferred app - I used preview. Clicked on second icon pressed cmd + a to select whole image and pressed cmd + c to copy it.
  10. Clicked on first image in Pridetree ThemeEngine and pressed cmd + v to paste it.
  11. Repeat with second image.
  12. Save the document
  13. Replace Assets.car in the app Contents/Resources with modified Assets.car.

Do not forget to backup your files. Your are doing this on your own risk as I do not know if it actually breaks the EULA.

  • 1
    Holy F... this icon change has been driving me nuts! I wish companies would stop disrupting my work-flow. Having to temporarily memorize what a new app icon looks like for a week is quite annoying. I keep clicking on the wrong icon! Jun 19, 2019 at 15:24
  • Update: Doesn't work on Catalina (10.15). Jun 19, 2019 at 15:50
  • 1
    @SterlingBourne check my answer… Jun 21, 2019 at 6:05

Without being sure (I'm not in front of my mac now), an .app file is a zip file ... which contains icons. Maybe you can try to change them.

In any case, work on a copy of the .app file, and try to load from that copy (maybe there are some integrity checks).


  • You said, "an .app file is a zip file"... well, no it's not a zip file! It's an application bundle, which is actually just and ordinary folder containing other folders and files, but is treated differently because of how the OS handles files with the .app extension. Jun 19, 2019 at 15:29
  • Indeed, I was confusing. Anyway, zip file or directory, it is possible to change what is inside. Sorry for the confusion. Jun 19, 2019 at 21:40

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