With the advent of Gatekeeper, OS X now uses the quarantine extended attribute to warn you that the file or application was downloaded from the internet. This can be an annoyance for end users if you are offering files or applications to them and the quarantine attribute is present on the file. To get around this you can remove the quaratine attribute from the command line. Rich Trouton has a handy post describing how to do this on his blog.
Nate Walck
Nate is a Systems Reliability Engineer at Dropbox, Inc in San Francisco, CA. He runs afp548.com along with Sam Keeley and is one of the founding members of the ##osx-server IRC channel on freenode.net. He loves being involved in the Mac Admin community and using Open Source projects whenever possible, especially Munki, The Luggage and Puppet.
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