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  • USM Macintosh Printer Migration

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The dialog is from GateKeeper, and is prompting you to verify that you want to run an unidentified utility. Please click OPEN to proceed. (Do the same if it just says that it's an application downloaded from the Internet.)

Further directions for choosing the correct printer driver and enabling printer features are here:

To enable double-sided printing (and stapling) to Océ Variolink print drivers on Macintosh computers