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We have a requirement that forbids users writing to removable media such as CDs. So far all I've been able to find is

defaults write com.apple.finder ProhibitBurn true

but that is a per-user setting that can be reversed by the user and doesn't prevent them from writing with an app other than finder.

Is it possible to take user level preferences from ~/Library and put them in /Library such that they override a value the user might later try to set? This way I can at least prevent them using finder to burn media.

Secondly, is there any global method of preventing any write access to the cdrom device?

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    Did you look the parental controls. They're able to disable burning and it's probably possible to enable it to every non admin users. – Matthieu Riegler Dec 18 '13 at 1:25
  • Users are authenticated by Active Directory, and parental controls only work on local users. – Tom S Dec 18 '13 at 16:16

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