I've extracted some XML files from an email attachment. I would like to open them in Webstorm instead of Xcode. But when I try to use the "Open With -> Other" and pick Webstorm, I get a message about being unable to install the app. That doesn't make any sense, since xml files are just text. Screenshots:

Open With... Warning

Are XML files somehow defined as apps by OS X? Is there a way to change that? Is this a bug?

I have verified that the file is just xml and it can be opened by WebStorm with no issues. This seems to be a Finder/security issue.

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    Which also begs the question: How do you sign an XML so that the OS identifies it as coming from an identified developer? Seems a bit odd. I'll post a workaround though. – William T Froggard Jun 10 '15 at 21:59

Open Terminal and type xattr -rd com.apple.quarantine followed by a space, then drag the file or folder of files that you can't open directly into the Terminal window, and push return. You should now be able to open the file directly.

  • would I have to do that for every file? – jcollum Jun 10 '15 at 23:16
  • @jcollum if you have a bunch of files in a folder that need this, use the command xattr -rd com.apple.quarantine, then a space, but drag the folder in instead, and push return. – William T Froggard Jun 10 '15 at 23:23

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