Determining what files are considered open in Mac OSX

Posted by Doug on Super User See other posts from Super User or by Doug
Published on 2010-06-14T20:03:06Z Indexed on 2010/06/15 2:13 UTC
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macosx

Hi all;

Apologies if this has been discussed previously... I did a stack overflow and google search but probably didn't use the right keywords.

Anyway, is there an easy way to determine what files are open on Mac OS X? I had an issue in which I could not unmount a firewire HD until I closed all running apps. Turns out keychain access had a reference to a file on the HD, but it begged the question: how to find out what files are open and what app (or apps) has the file open?

Thanks in advance and again apologies if this has been covered previously.

Doug.

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