Trying to clean up their hard disk, some users discover ~/Library/Caches/com.apple.bird is pretty big. In the order of too many Gigabytes. What is it?
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'Bird' is part of the iCloud structure. You would have a large cache if there are pending documents to upload or process. Over time, com.apple.bird cache is generally kept cleaner than your singing. Mine is 400 KB [that's K, not even M] You can diagnose this with With that large a cache you should be able to dump and then monitor whatever categories/classes of data have the most size.
It's exceptionally verbose and you might not want to spend time learning what it does - but the data is quite helpful in determining what's actually happening and gives you an option before reaching out to AppleCare or another support tech in cases where you don't see the cache clearing itself over time. |
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Bird is part of iCloud and the files in the folder might be owned by any app using iCloud. I wrote a simple Python script to try and find out who owns the files in the directory:
So on my Mac WhatsApp is the biggest culprit. I filed a bug report with them (although I am not sure if it's really their fault). |
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