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List Full Download History of Your Mac
Authored by: mbroughtn on Jul 19, '12 04:54:20PM

I am not sure how you are determining there is an quarantine xattr for Desktop or Download. I do see an ACL for the standard User directories to prevent them from being deleted, but no xattr -- quarantine or other.

I did some more testing and have had mixed results as to what application will add the quarantine xattr for downloads. When I use Safari, Camino, Firefox, Chrome, or Cyberduck (ftp client), the downloads will have the quarantine xattr. If I use iCab (browser) or Transmit (ftp), the downloads do not have a quarantine xattr.

I think you will also find that if you have downloaded a file and cleared the quarantine bit using Apple's dialog window, you can download the same file again and the quarantine bit will not be set. I did not test this in any detail, however.

The bottom line is to not totally rely on the quarantine bit being set for a download.

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Re: List Full Download History of Your Mac
Authored by: Uncle Asad on Jul 20, '12 02:34:42PM

Specifically, some applications opt-in to quarantining via a key in their Info.plist, but Apple also includes in the OS a plist containing bundle identifiers of some applications (just common web browsers, last I checked) whose downloads the quarantine system automatically quarantines regardless of whether the application has opted-in itself.

So if you download files with command-line tools like curl or wget or a with third-party application that isn't on Apple's list and hasn't opted-in to quarantining, then those files won't be quarantined (and won't be included in this database).

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