Finder file icon badging (icon overlay) on Mac OS X >= 10.6

Question

I\'m searching for a solution to do File icon overlays (icon badging) (like Dropbox does it on mac) with cocoa on Mac.

Does anyone knows a way to do this?

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Answer 1

I know this is an old question.

In recent time there is a library that implement this functionality: https://github.com/liferay/liferay-nativity.