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After upgrading to Lion, and verifying/repairing my disk, I noticed a 3.5 GB file in /lost+found. Ran file on it and it reported it as an xar archive, so I ran xar -t on it to discover it is the Lion installer I downloaded from the App Store.

Just wondering if anyone else sees this and if it's safe to delete the file?

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Just realized you said /lost+found, not trash. I found this article regarding lost and found folder. Maybe you had a system issue in the past, and some files were saved there to help recover. Check out the article. Very interesting.

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Yes, like I said in the question, it is the Lion installer. If it "self-destructs" it certainly doesn't do a very good job at it. As it still leaves a 3.5 GB file orphaned on my HD. –  Michael Irwin Jul 25 '11 at 13:27
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Oh. Sorry. I still misread your question lol. I don't even have a lost+found directory. I would assume it's ok to delete if your installation completed successfully though. –  Thomas Jul 25 '11 at 13:31
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