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Editorial Team
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Asked: 2026-05-28T02:40:12+00:00

In the Windows API, when you monitor a directory, the callback provides what changed.

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In the Windows API, when you monitor a directory, the callback provides what changed. How do I accomplish the same for Mac OS X?

I looked at the File System Events API and the Kernel Events API and it seems like they both watch a file descriptor and return what changes happened to that file descriptor. This is inconvenient because now I have to open watchers on the entire file structure and remember the previous names (in case of a rename).

Is there a better way (that doesn’t involve a library)?

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1 Answer

  1. Editorial Team

    FSEvents watches a directory hierarchy (or multiple hierarchies), not a file descriptor. So you only need one watcher. But you will need to scan the directories to find out which files changed. There is no better way (that doesn’t involve a library).

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