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How do I add the extended attributes?

I am using excel with local file links and opening files but I need to add extended attributes to each file. So I do not get the prompt Grand File Access.

My files looks like File-01.html...File-99.html.

I need to add the xattr com.apple.quarantine: 0002;580fbaf1;Microsoft Excel; to every *.html file. How can I do that?

Whitecat
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    Have you tried using the `xattr` command? Or is the issue that setting `com.apple.quarantine` doesn't do what you expect? If the latter then I think you'll find that attribute is private to Apple and its format not public. HTH – CRD Oct 26 '16 at 08:26
  • @CRD I do not know how to use the xattr command. – Whitecat Nov 02 '16 at 21:41
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    Try opening Terminal and typing `man xattr`, or look in Xcode documentation, or search on the web. – CRD Nov 02 '16 at 23:26

2 Answers2

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Try this:

xattr -w myattr myattrvalue
סטנלי גרונן
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explorer2020
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"There's an app for that". xattred - the extended attribute editor will help you do that. xattred is a GUI app, and may not be exactly what you want for editing 100 files, but it will help you get your xattr construction formulated quickly, and then switch to the CLI tool xattr for the repetetive operation.